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The 7.7x is not a brute-force win — pino doesn't try to accumulate context, so the comparison reflects an architectural difference, not a fairness issue. See ",[466,686,688],{"href":687},"#when-evlog-might-not-win","When evlog might not win"," for the honest gaps.",[487,691,693],{"id":692},"what-is-the-wide-event-lifecycle","What is the \"wide event lifecycle\"?",[457,695,696],{},"This benchmark simulates a real API request:",[698,699,700,966],"code-group",{},[701,702,708],"pre",{"className":703,"code":704,"filename":705,"language":706,"meta":707,"style":707},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","const log = createLogger({ method: 'POST', path: '\u002Fapi\u002Fcheckout', requestId: 'req_abc' })\nlog.set({ user: { id: 'usr_123', plan: 'pro' } })\nlog.set({ cart: { items: 3, total: 9999 } })\nlog.set({ payment: { method: 'card', last4: '4242' } })\nlog.emit({ status: 200 })\n","evlog (1 event)","typescript","",[482,709,710,789,844,889,940],{"__ignoreMap":707},[711,712,715,719,723,727,731,734,737,741,744,747,751,754,757,760,762,764,767,769,771,774,776,778,781,783,786],"span",{"class":713,"line":714},"line",1,[711,716,718],{"class":717},"spNyl","const",[711,720,722],{"class":721},"sTEyZ"," log ",[711,724,726],{"class":725},"sMK4o","=",[711,728,730],{"class":729},"s2Zo4"," createLogger",[711,732,733],{"class":721},"(",[711,735,736],{"class":725},"{",[711,738,740],{"class":739},"swJcz"," method",[711,742,743],{"class":725},":",[711,745,746],{"class":725}," '",[711,748,750],{"class":749},"sfazB","POST",[711,752,753],{"class":725},"'",[711,755,756],{"class":725},",",[711,758,759],{"class":739}," path",[711,761,743],{"class":725},[711,763,746],{"class":725},[711,765,766],{"class":749},"\u002Fapi\u002Fcheckout",[711,768,753],{"class":725},[711,770,756],{"class":725},[711,772,773],{"class":739}," requestId",[711,775,743],{"class":725},[711,777,746],{"class":725},[711,779,780],{"class":749},"req_abc",[711,782,753],{"class":725},[711,784,785],{"class":725}," }",[711,787,788],{"class":721},")\n",[711,790,792,795,797,800,802,804,807,809,812,815,817,819,822,824,826,829,831,833,836,838,840,842],{"class":713,"line":791},2,[711,793,794],{"class":721},"log",[711,796,472],{"class":725},[711,798,799],{"class":729},"set",[711,801,733],{"class":721},[711,803,736],{"class":725},[711,805,806],{"class":739}," user",[711,808,743],{"class":725},[711,810,811],{"class":725}," {",[711,813,814],{"class":739}," id",[711,816,743],{"class":725},[711,818,746],{"class":725},[711,820,821],{"class":749},"usr_123",[711,823,753],{"class":725},[711,825,756],{"class":725},[711,827,828],{"class":739}," plan",[711,830,743],{"class":725},[711,832,746],{"class":725},[711,834,835],{"class":749},"pro",[711,837,753],{"class":725},[711,839,785],{"class":725},[711,841,785],{"class":725},[711,843,788],{"class":721},[711,845,847,849,851,853,855,857,860,862,864,867,869,873,875,878,880,883,885,887],{"class":713,"line":846},3,[711,848,794],{"class":721},[711,850,472],{"class":725},[711,852,799],{"class":729},[711,854,733],{"class":721},[711,856,736],{"class":725},[711,858,859],{"class":739}," cart",[711,861,743],{"class":725},[711,863,811],{"class":725},[711,865,866],{"class":739}," items",[711,868,743],{"class":725},[711,870,872],{"class":871},"sbssI"," 3",[711,874,756],{"class":725},[711,876,877],{"class":739}," total",[711,879,743],{"class":725},[711,881,882],{"class":871}," 9999",[711,884,785],{"class":725},[711,886,785],{"class":725},[711,888,788],{"class":721},[711,890,892,894,896,898,900,902,905,907,909,911,913,915,918,920,922,925,927,929,932,934,936,938],{"class":713,"line":891},4,[711,893,794],{"class":721},[711,895,472],{"class":725},[711,897,799],{"class":729},[711,899,733],{"class":721},[711,901,736],{"class":725},[711,903,904],{"class":739}," payment",[711,906,743],{"class":725},[711,908,811],{"class":725},[711,910,740],{"class":739},[711,912,743],{"class":725},[711,914,746],{"class":725},[711,916,917],{"class":749},"card",[711,919,753],{"class":725},[711,921,756],{"class":725},[711,923,924],{"class":739}," last4",[711,926,743],{"class":725},[711,928,746],{"class":725},[711,930,931],{"class":749},"4242",[711,933,753],{"class":725},[711,935,785],{"class":725},[711,937,785],{"class":725},[711,939,788],{"class":721},[711,941,943,945,947,950,952,954,957,959,962,964],{"class":713,"line":942},5,[711,944,794],{"class":721},[711,946,472],{"class":725},[711,948,949],{"class":729},"emit",[711,951,733],{"class":721},[711,953,736],{"class":725},[711,955,956],{"class":739}," status",[711,958,743],{"class":725},[711,960,961],{"class":871}," 200",[711,963,785],{"class":725},[711,965,788],{"class":721},[701,967,970],{"className":703,"code":968,"filename":969,"language":706,"meta":707,"style":707},"const child = pinoLogger.child({ method: 'POST', path: '\u002Fapi\u002Fcheckout', requestId: 'req_abc' })\nchild.info({ user: { id: 'usr_123', plan: 'pro' } }, 'user context')\nchild.info({ cart: { items: 3, total: 9999 } }, 'cart context')\nchild.info({ payment: { method: 'card', last4: '4242' } }, 'payment context')\nchild.info({ status: 200 }, 'request complete')\n","pino (4 log lines)",[482,971,972,1031,1085,1130,1183],{"__ignoreMap":707},[711,973,974,976,979,981,984,986,989,991,993,995,997,999,1001,1003,1005,1007,1009,1011,1013,1015,1017,1019,1021,1023,1025,1027,1029],{"class":713,"line":714},[711,975,718],{"class":717},[711,977,978],{"class":721}," child ",[711,980,726],{"class":725},[711,982,983],{"class":721}," pinoLogger",[711,985,472],{"class":725},[711,987,988],{"class":729},"child",[711,990,733],{"class":721},[711,992,736],{"class":725},[711,994,740],{"class":739},[711,996,743],{"class":725},[711,998,746],{"class":725},[711,1000,750],{"class":749},[711,1002,753],{"class":725},[711,1004,756],{"class":725},[711,1006,759],{"class":739},[711,1008,743],{"class":725},[711,1010,746],{"class":725},[711,1012,766],{"class":749},[711,1014,753],{"class":725},[711,1016,756],{"class":725},[711,1018,773],{"class":739},[711,1020,743],{"class":725},[711,1022,746],{"class":725},[711,1024,780],{"class":749},[711,1026,753],{"class":725},[711,1028,785],{"class":725},[711,1030,788],{"class":721},[711,1032,1033,1035,1037,1039,1041,1043,1045,1047,1049,1051,1053,1055,1057,1059,1061,1063,1065,1067,1069,1071,1073,1076,1078,1081,1083],{"class":713,"line":791},[711,1034,988],{"class":721},[711,1036,472],{"class":725},[711,1038,680],{"class":729},[711,1040,733],{"class":721},[711,1042,736],{"class":725},[711,1044,806],{"class":739},[711,1046,743],{"class":725},[711,1048,811],{"class":725},[711,1050,814],{"class":739},[711,1052,743],{"class":725},[711,1054,746],{"class":725},[711,1056,821],{"class":749},[711,1058,753],{"class":725},[711,1060,756],{"class":725},[711,1062,828],{"class":739},[711,1064,743],{"class":725},[711,1066,746],{"class":725},[711,1068,835],{"class":749},[711,1070,753],{"class":725},[711,1072,785],{"class":725},[711,1074,1075],{"class":725}," },",[711,1077,746],{"class":725},[711,1079,1080],{"class":749},"user context",[711,1082,753],{"class":725},[711,1084,788],{"class":721},[711,1086,1087,1089,1091,1093,1095,1097,1099,1101,1103,1105,1107,1109,1111,1113,1115,1117,1119,1121,1123,1126,1128],{"class":713,"line":846},[711,1088,988],{"class":721},[711,1090,472],{"class":725},[711,1092,680],{"class":729},[711,1094,733],{"class":721},[711,1096,736],{"class":725},[711,1098,859],{"class":739},[711,1100,743],{"class":725},[711,1102,811],{"class":725},[711,1104,866],{"class":739},[711,1106,743],{"class":725},[711,1108,872],{"class":871},[711,1110,756],{"class":725},[711,1112,877],{"class":739},[711,1114,743],{"class":725},[711,1116,882],{"class":871},[711,1118,785],{"class":725},[711,1120,1075],{"class":725},[711,1122,746],{"class":725},[711,1124,1125],{"class":749},"cart context",[711,1127,753],{"class":725},[711,1129,788],{"class":721},[711,1131,1132,1134,1136,1138,1140,1142,1144,1146,1148,1150,1152,1154,1156,1158,1160,1162,1164,1166,1168,1170,1172,1174,1176,1179,1181],{"class":713,"line":891},[711,1133,988],{"class":721},[711,1135,472],{"class":725},[711,1137,680],{"class":729},[711,1139,733],{"class":721},[711,1141,736],{"class":725},[711,1143,904],{"class":739},[711,1145,743],{"class":725},[711,1147,811],{"class":725},[711,1149,740],{"class":739},[711,1151,743],{"class":725},[711,1153,746],{"class":725},[711,1155,917],{"class":749},[711,1157,753],{"class":725},[711,1159,756],{"class":725},[711,1161,924],{"class":739},[711,1163,743],{"class":725},[711,1165,746],{"class":725},[711,1167,931],{"class":749},[711,1169,753],{"class":725},[711,1171,785],{"class":725},[711,1173,1075],{"class":725},[711,1175,746],{"class":725},[711,1177,1178],{"class":749},"payment context",[711,1180,753],{"class":725},[711,1182,788],{"class":721},[711,1184,1185,1187,1189,1191,1193,1195,1197,1199,1201,1203,1205,1208,1210],{"class":713,"line":942},[711,1186,988],{"class":721},[711,1188,472],{"class":725},[711,1190,680],{"class":729},[711,1192,733],{"class":721},[711,1194,736],{"class":725},[711,1196,956],{"class":739},[711,1198,743],{"class":725},[711,1200,961],{"class":871},[711,1202,1075],{"class":725},[711,1204,746],{"class":725},[711,1206,1207],{"class":749},"request complete",[711,1209,753],{"class":725},[711,1211,788],{"class":721},[457,1213,1214],{},"Same CPU cost, but evlog gives you everything in one place.",[474,1216,1218],{"id":1217},"why-is-evlog-faster","Why is evlog faster?",[457,1220,1221],{},"The numbers above aren't magic, they come from deliberate architectural choices:",[457,1223,1224,1227,1228,1231,1232,1235,1236,1239],{},[461,1225,1226],{},"In-place mutations, not copies."," ",[482,1229,1230],{},"log.set()"," writes directly into the context object via a recursive ",[482,1233,1234],{},"mergeInto"," function. Other loggers clone objects on every call (object spread, ",[482,1237,1238],{},"Object.assign","). evlog never allocates intermediate objects during context accumulation.",[457,1241,1242,1245,1246,1249,1250,1253],{},[461,1243,1244],{},"No serialization until drain."," Context stays as plain JavaScript objects throughout the request lifecycle. ",[482,1247,1248],{},"JSON.stringify"," runs exactly once, at emit time. Traditional loggers serialize on every ",[482,1251,1252],{},".info()"," call, that's 4x serialization for 4 log lines.",[457,1255,1256,1259,1260,1263],{},[461,1257,1258],{},"Lazy allocation."," Timestamps, sampling context, and override objects are only created when actually needed. If tail sampling is disabled (the common case), its context object is never allocated. The ",[482,1261,1262],{},"Date"," instance used for ISO timestamps is reused across calls.",[457,1265,1266,1269],{},[461,1267,1268],{},"One event, not N lines."," For a typical request, pino emits 4+ JSON lines that all need serializing, transporting, and indexing. evlog emits one. That's 75% less work for your log drain, fewer bytes on the wire, and one row to query instead of four.",[457,1271,1272,1275],{},[461,1273,1274],{},"RegExp caching."," Glob patterns (used in sampling and route matching) are compiled once and cached. Repeated evaluations hit the cache instead of recompiling.",[474,1277,688],{"id":1278},"when-evlog-might-not-win",[457,1280,1281],{},"The benchmarks above measure CPU + serialization cost on the main thread, with no real I\u002FO. That's the standard setup pino, winston, and logtape use for their own benchmarks — but it leaves out a few scenarios where another logger can edge ahead. Be honest about these:",[457,1283,1284,1287,1288,1293,1294,1297,1298,1301,1302,1305],{},[461,1285,1286],{},"Fire-and-forget hot paths with pino-via-worker-thread."," In production, pino is typically configured with a ",[466,1289,1292],{"href":1290,"rel":1291},"https:\u002F\u002Fgetpino.io\u002F#\u002Fdocs\u002Ftransports",[470],"worker-thread transport"," (",[482,1295,1296],{},"pino-pretty",", ",[482,1299,1300],{},"pino-loki",", vendor-specific transports). The serialization and I\u002FO move off the main thread entirely. For a workload that emits hundreds of thousands of ",[482,1303,1304],{},"log.info('foo')"," lines per second with no context accumulation, pino-via-worker can hit ~2-3M ops\u002Fs on the main thread because it's just queueing. We can't benchmark that mode fairly inside a single-threaded vitest process, so it's not in our table — but it's a real scenario where pino is faster.",[457,1307,1308,1311,1312,1315],{},[461,1309,1310],{},"CLI \u002F pretty-only output without serialization."," consola's no-op reporter mode in our benchmarks (",[482,1313,1314],{},"level: 4, reporters: [{ log: () => {} }]",") skips JSON serialization entirely. That's realistic if you're using consola for a CLI with terminal-only output, but it's why consola wins \"simple string\" and \"burst\" — it's not doing the same work. evlog and pino both serialize to JSON; consola in those benchmarks does not. If your use case is \"pretty terminal output, no shipping logs anywhere\", consola is genuinely lighter.",[457,1317,1318,1325,1326,1329,1330,1333,1334,1337],{},[461,1319,1320,1321,1324],{},"Single ",[482,1322,1323],{},"log.info"," calls, no context accumulation."," evlog and pino are roughly tied on ",[482,1327,1328],{},"pino.info('hello')"," vs ",[482,1331,1332],{},"evlog.info('hello')"," (1.83M vs 1.09M ops\u002Fs in our run, but the gap closes further if pino runs in async mode). evlog's ~7.7x advantage shows up specifically when you'd otherwise emit N separate lines for one logical operation. If you genuinely log one line per call and don't accumulate, the speed delta is much smaller — pick evlog for the API ergonomics (",[482,1335,1336],{},"log.set"," + structured errors), not raw throughput.",[457,1339,1340,1343,1344,1347],{},[461,1341,1342],{},"Wall-clock variance is real."," Vitest bench numbers shift ±5-10% between runs on the same machine (thermal throttling, GC, other processes). The numbers above come from a single run on a MacBook; CI tracks regressions via ",[466,1345,471],{"href":468,"rel":1346},[470],"'s CPU-instruction counting (deterministic, ±0.5% noise floor) but the absolute hz values in this page are the wall-clock snapshot, not a guaranteed floor.",[457,1349,1350,1351,1354],{},"The takeaway: ",[461,1352,1353],{},"the wins are real for the wide event pattern",", but if your stack is \"pure fire-and-forget pino with a worker transport\", that's the one place we don't claim to beat.",[474,1356,1358],{"id":1357},"real-world-overhead","Real-world overhead",[457,1360,1361],{},"For a typical API request:",[495,1363,1364,1374],{},[498,1365,1366],{},[501,1367,1368,1371],{},[504,1369,1370],{},"Component",[504,1372,1373],{"align":509},"Cost",[521,1375,1376,1383,1395,1405,1412,1420],{},[501,1377,1378,1380],{},[526,1379,643],{},[526,1381,1382],{"align":509},"52ns",[501,1384,1385,1392],{},[526,1386,1387,1388,1391],{},"3x ",[482,1389,1390],{},"set()"," calls",[526,1393,1394],{"align":509},"105ns",[501,1396,1397,1402],{},[526,1398,1399],{},[482,1400,1401],{},"emit()",[526,1403,1404],{"align":509},"588ns",[501,1406,1407,1409],{},[526,1408,61],{},[526,1410,1411],{"align":509},"22ns",[501,1413,1414,1417],{},[526,1415,1416],{},"Enricher pipeline",[526,1418,1419],{"align":509},"2.14µs",[501,1421,1422,1427],{},[526,1423,1424],{},[461,1425,1426],{},"Total",[526,1428,1429],{"align":509},[461,1430,1431],{},"~2.9µs",[457,1433,1434,1435,472],{},"For context, a database query takes 1-50ms, an HTTP call takes 10-500ms. evlog's overhead is ",[461,1436,1437],{},"invisible",[474,1439,1441],{"id":1440},"bundle-size","Bundle size",[457,1443,1444],{},"Every entry point is tree-shakeable. You only pay for what you import.",[495,1446,1447,1457],{},[498,1448,1449],{},[501,1450,1451,1454],{},[504,1452,1453],{},"Entry",[504,1455,1456],{"align":509},"Gzip",[521,1458,1459,1470,1481,1489,1497,1505,1513,1521,1529,1537],{},[501,1460,1461,1467],{},[526,1462,1463,1464,1466],{},"core (",[482,1465,510],{},")",[526,1468,1469],{"align":509},"510 B",[501,1471,1472,1478],{},[526,1473,1474,1475,1466],{},"toolkit (",[482,1476,1477],{},"evlog\u002Ftoolkit",[526,1479,1480],{"align":509},"720 B",[501,1482,1483,1486],{},[526,1484,1485],{},"utils",[526,1487,1488],{"align":509},"1.58 kB",[501,1490,1491,1494],{},[526,1492,1493],{},"error",[526,1495,1496],{"align":509},"1.46 kB",[501,1498,1499,1502],{},[526,1500,1501],{},"enrichers",[526,1503,1504],{"align":509},"1.99 kB",[501,1506,1507,1510],{},[526,1508,1509],{},"pipeline",[526,1511,1512],{"align":509},"1.35 kB",[501,1514,1515,1518],{},[526,1516,1517],{},"http",[526,1519,1520],{"align":509},"1.22 kB",[501,1522,1523,1526],{},[526,1524,1525],{},"browser",[526,1527,1528],{"align":509},"289 B",[501,1530,1531,1534],{},[526,1532,1533],{},"workers",[526,1535,1536],{"align":509},"1.30 kB",[501,1538,1539,1542],{},[526,1540,1541],{},"client",[526,1543,1544],{"align":509},"128 B",[457,1546,1547,1548,1551,1552,1555,1556,1559,1560,1297,1563,1297,1566,1569,1570,1573,1574,1577,1578,1581],{},"A typical Node.js bundle (",[482,1549,1550],{},"initLogger"," + ",[482,1553,1554],{},"createLogger",") measures ",[461,1557,1558],{},"~6.3 kB gzip"," end-to-end after tree-shaking; adding ",[482,1561,1562],{},"createRequestLogger",[482,1564,1565],{},"createError",[482,1567,1568],{},"parseError",", and ",[482,1571,1572],{},"useLogger"," brings the bundle to ",[461,1575,1576],{},"~7.2 kB gzip",". Adapters and framework integrations sit on top: Hono is 617 B, Express 734 B, Axiom 1.48 kB. Bundle size is tracked on every PR and compared against the ",[482,1579,1580],{},"main"," baseline.",[474,1583,1585],{"id":1584},"detailed-benchmarks","Detailed benchmarks",[487,1587,643],{"id":1588},"logger-creation",[495,1590,1591,1604],{},[498,1592,1593],{},[501,1594,1595,1598,1601],{},[504,1596,1597],{},"Operation",[504,1599,1600],{"align":509},"ops\u002Fsec",[504,1602,1603],{"align":509},"Mean",[521,1605,1606,1619,1632,1645,1659],{},[501,1607,1608,1614,1617],{},[526,1609,1610,1613],{},[482,1611,1612],{},"createLogger()"," (no context)",[526,1615,1616],{"align":509},"19.20M",[526,1618,1382],{"align":509},[501,1620,1621,1626,1629],{},[526,1622,1623,1625],{},[482,1624,1612],{}," (shallow context)",[526,1627,1628],{"align":509},"18.74M",[526,1630,1631],{"align":509},"53ns",[501,1633,1634,1639,1642],{},[526,1635,1636,1638],{},[482,1637,1612],{}," (nested context)",[526,1640,1641],{"align":509},"17.70M",[526,1643,1644],{"align":509},"56ns",[501,1646,1647,1653,1656],{},[526,1648,1649,1652],{},[482,1650,1651],{},"createRequestLogger()"," (method + path)",[526,1654,1655],{"align":509},"16.91M",[526,1657,1658],{"align":509},"59ns",[501,1660,1661,1666,1669],{},[526,1662,1663,1665],{},[482,1664,1651],{}," (method + path + requestId)",[526,1667,1668],{"align":509},"12.67M",[526,1670,1671],{"align":509},"79ns",[487,1673,1675,1676,1466],{"id":1674},"context-accumulation-logset","Context accumulation (",[482,1677,1230],{},[495,1679,1680,1690],{},[498,1681,1682],{},[501,1683,1684,1686,1688],{},[504,1685,1597],{},[504,1687,1600],{"align":509},[504,1689,1603],{"align":509},[521,1691,1692,1702,1713,1724],{},[501,1693,1694,1697,1700],{},[526,1695,1696],{},"Shallow merge (3 fields)",[526,1698,1699],{"align":509},"9.56M",[526,1701,1394],{"align":509},[501,1703,1704,1707,1710],{},[526,1705,1706],{},"Shallow merge (10 fields)",[526,1708,1709],{"align":509},"4.79M",[526,1711,1712],{"align":509},"209ns",[501,1714,1715,1718,1721],{},[526,1716,1717],{},"Deep nested merge",[526,1719,1720],{"align":509},"8.04M",[526,1722,1723],{"align":509},"124ns",[501,1725,1726,1729,1732],{},[526,1727,1728],{},"4 sequential calls",[526,1730,1731],{"align":509},"7.05M",[526,1733,1734],{"align":509},"142ns",[487,1736,1738,1739,1466],{"id":1737},"event-emission-logemit","Event emission (",[482,1740,1741],{},"log.emit()",[495,1743,1744,1754],{},[498,1745,1746],{},[501,1747,1748,1750,1752],{},[504,1749,1597],{},[504,1751,1600],{"align":509},[504,1753,1603],{"align":509},[521,1755,1756,1767,1776,1787],{},[501,1757,1758,1761,1764],{},[526,1759,1760],{},"Emit minimal event",[526,1762,1763],{"align":509},"1.93M",[526,1765,1766],{"align":509},"519ns",[501,1768,1769,1772,1774],{},[526,1770,1771],{},"Emit with context",[526,1773,591],{"align":509},[526,1775,1404],{"align":509},[501,1777,1778,1781,1784],{},[526,1779,1780],{},"Full lifecycle (create + 3 sets + emit)",[526,1782,1783],{"align":509},"1.59M",[526,1785,1786],{"align":509},"628ns",[501,1788,1789,1792,1795],{},[526,1790,1791],{},"Emit with error",[526,1793,1794],{"align":509},"65.9K",[526,1796,1797],{"align":509},"15.17µs",[678,1799,1802,1805,1806,1809],{"color":1800,"icon":1801},"amber","i-lucide-triangle-alert",[482,1803,1804],{},"emit with error"," is slower because ",[482,1807,1808],{},"Error.captureStackTrace()"," is an expensive V8 operation (~15µs). This only triggers when errors are thrown.",[487,1811,1813],{"id":1812},"payload-scaling","Payload scaling",[495,1815,1816,1827],{},[498,1817,1818],{},[501,1819,1820,1823,1825],{},[504,1821,1822],{},"Payload",[504,1824,1600],{"align":509},[504,1826,1603],{"align":509},[521,1828,1829,1840,1851],{},[501,1830,1831,1834,1837],{},[526,1832,1833],{},"Small (2 fields)",[526,1835,1836],{"align":509},"1.72M",[526,1838,1839],{"align":509},"581ns",[501,1841,1842,1845,1848],{},[526,1843,1844],{},"Medium (50 fields)",[526,1846,1847],{"align":509},"569.8K",[526,1849,1850],{"align":509},"1.76µs",[501,1852,1853,1856,1859],{},[526,1854,1855],{},"Large (200 nested fields)",[526,1857,1858],{"align":509},"131.2K",[526,1860,1861],{"align":509},"7.62µs",[487,1863,61],{"id":1864},"sampling",[495,1866,1867,1877],{},[498,1868,1869],{},[501,1870,1871,1873,1875],{},[504,1872,1597],{},[504,1874,1600],{"align":509},[504,1876,1603],{"align":509},[521,1878,1879,1889],{},[501,1880,1881,1884,1887],{},[526,1882,1883],{},"Tail sampling (shouldKeep)",[526,1885,1886],{"align":509},"44.97M",[526,1888,1411],{"align":509},[501,1890,1891,1894,1897],{},[526,1892,1893],{},"Full emit with head + tail",[526,1895,1896],{"align":509},"7.01M",[526,1898,1899],{"align":509},"143ns",[487,1901,349],{"id":1501},[495,1903,1904,1915],{},[498,1905,1906],{},[501,1907,1908,1911,1913],{},[504,1909,1910],{},"Enricher",[504,1912,1600],{"align":509},[504,1914,1603],{"align":509},[521,1916,1917,1928,1939,1950,1961],{},[501,1918,1919,1922,1925],{},[526,1920,1921],{},"User Agent (Chrome)",[526,1923,1924],{"align":509},"2.61M",[526,1926,1927],{"align":509},"384ns",[501,1929,1930,1933,1936],{},[526,1931,1932],{},"Geo (Vercel)",[526,1934,1935],{"align":509},"3.88M",[526,1937,1938],{"align":509},"258ns",[501,1940,1941,1944,1947],{},[526,1942,1943],{},"Request Size",[526,1945,1946],{"align":509},"12.37M",[526,1948,1949],{"align":509},"81ns",[501,1951,1952,1955,1958],{},[526,1953,1954],{},"Trace Context",[526,1956,1957],{"align":509},"4.35M",[526,1959,1960],{"align":509},"230ns",[501,1962,1963,1968,1973],{},[526,1964,1965],{},[461,1966,1967],{},"All combined (all headers)",[526,1969,1970],{"align":509},[461,1971,1972],{},"466.7K",[526,1974,1975],{"align":509},[461,1976,1419],{},[487,1978,1980],{"id":1979},"error-handling","Error handling",[495,1982,1983,1993],{},[498,1984,1985],{},[501,1986,1987,1989,1991],{},[504,1988,1597],{},[504,1990,1600],{"align":509},[504,1992,1603],{"align":509},[521,1994,1995,2008,2020],{},[501,1996,1997,2002,2005],{},[526,1998,1999],{},[482,2000,2001],{},"createError()",[526,2003,2004],{"align":509},"232.2K",[526,2006,2007],{"align":509},"4.31µs",[501,2009,2010,2015,2018],{},[526,2011,2012],{},[482,2013,2014],{},"parseError()",[526,2016,2017],{"align":509},"45.48M",[526,2019,1411],{"align":509},[501,2021,2022,2025,2028],{},[526,2023,2024],{},"Round-trip (create + parse)",[526,2026,2027],{"align":509},"231.4K",[526,2029,2030],{"align":509},"4.32µs",[487,2032,2034],{"id":2033},"middleware-pipeline","Middleware pipeline",[495,2036,2037,2047],{},[498,2038,2039],{},[501,2040,2041,2043,2045],{},[504,2042,1597],{},[504,2044,1600],{"align":509},[504,2046,1603],{"align":509},[521,2048,2049,2063,2076,2090,2103,2114],{},[501,2050,2051,2057,2060],{},[526,2052,2053,2056],{},[482,2054,2055],{},"resolveMiddlewarePluginRunner"," (no plugins)",[526,2058,2059],{"align":509},"37.70M",[526,2061,2062],{"align":509},"27ns",[501,2064,2065,2070,2073],{},[526,2066,2067,2069],{},[482,2068,2055],{}," (2 plugins, cached)",[526,2071,2072],{"align":509},"32.26M",[526,2074,2075],{"align":509},"31ns",[501,2077,2078,2084,2087],{},[526,2079,2080,2083],{},[482,2081,2082],{},"createMiddlewareLogger"," (no plugins, safe headers)",[526,2085,2086],{"align":509},"4.41M",[526,2088,2089],{"align":509},"227ns",[501,2091,2092,2097,2100],{},[526,2093,2094,2096],{},[482,2095,2082],{}," (2 plugins, cached merge)",[526,2098,2099],{"align":509},"4.13M",[526,2101,2102],{"align":509},"242ns",[501,2104,2105,2108,2111],{},[526,2106,2107],{},"Full request lifecycle (no plugins, no drain)",[526,2109,2110],{"align":509},"993.7K",[526,2112,2113],{"align":509},"1.01µs",[501,2115,2116,2119,2122],{},[526,2117,2118],{},"Full request lifecycle (2 plugins, sync drain)",[526,2120,2121],{"align":509},"621.2K",[526,2123,2124],{"align":509},"1.61µs",[474,2126,2128],{"id":2127},"methodology-trust","Methodology & trust",[487,2130,2132],{"id":2131},"can-you-trust-these-numbers","Can you trust these numbers?",[457,2134,2135,2136,2139,2140,2143,2144,2151],{},"Every benchmark in this page is ",[461,2137,2138],{},"open source"," and ",[461,2141,2142],{},"reproducible",". The benchmark files live in ",[466,2145,2148],{"href":2146,"rel":2147},"https:\u002F\u002Fgithub.com\u002Fhugorcd\u002Fevlog\u002Ftree\u002Fmain\u002Fpackages\u002Fevlog\u002Fbench",[470],[482,2149,2150],{},"packages\u002Fevlog\u002Fbench\u002F",". You can read the exact code, run it on your machine, and verify the results.",[457,2153,2154],{},"All libraries are tested under the same conditions:",[2156,2157,2158,2165,2171,2188],"ul",{},[2159,2160,2161,2164],"li",{},[461,2162,2163],{},"Same output mode",": JSON to a no-op destination (no disk or network I\u002FO measured)",[2159,2166,2167,2170],{},[461,2168,2169],{},"Same warmup",": each benchmark runs for 500ms after JIT stabilization",[2159,2172,2173,2176,2177,2182,2183],{},[461,2174,2175],{},"Same tooling",": ",[466,2178,2181],{"href":2179,"rel":2180},"https:\u002F\u002Fvitest.dev\u002Fguide\u002Ffeatures#benchmarking",[470],"Vitest bench"," powered by ",[466,2184,2187],{"href":2185,"rel":2186},"https:\u002F\u002Fgithub.com\u002Ftinylibs\u002Ftinybench",[470],"tinybench",[2159,2189,2190,2193],{},[461,2191,2192],{},"Same machine",": when comparing libraries, all benchmarks run in the same process on the same hardware",[487,2195,2197],{"id":2196},"ci-regression-tracking","CI regression tracking",[457,2199,2200],{},"Performance regressions are tracked on every pull request via two systems:",[2156,2202,2203,2211],{},[2159,2204,2205,2210],{},[461,2206,2207],{},[466,2208,471],{"href":468,"rel":2209},[470]," runs all benchmarks using CPU instruction counting (not wall-clock timing). This eliminates noise from shared CI runners and produces deterministic, reproducible results. Regressions are flagged directly on the PR.",[2159,2212,2213,2216,2217,2219],{},[461,2214,2215],{},"Bundle size comparison"," measures all entry points against the ",[482,2218,1580],{}," baseline and posts a size delta report as a PR comment.",[487,2221,2223],{"id":2222},"run-it-yourself","Run it yourself",[701,2225,2230],{"className":2226,"code":2227,"filename":2228,"language":2229,"meta":707,"style":707},"language-bash shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","cd packages\u002Fevlog\n\npnpm run bench                          # all benchmarks\npnpm exec vitest bench bench\u002Fcomparison\u002F # vs alternatives only\npnpm exec tsx bench\u002Fscripts\u002Fsize.ts     # bundle size\n","Terminal","bash",[482,2231,2232,2240,2246,2262,2280],{"__ignoreMap":707},[711,2233,2234,2237],{"class":713,"line":714},[711,2235,2236],{"class":729},"cd",[711,2238,2239],{"class":749}," packages\u002Fevlog\n",[711,2241,2242],{"class":713,"line":791},[711,2243,2245],{"emptyLinePlaceholder":2244},true,"\n",[711,2247,2248,2252,2255,2258],{"class":713,"line":846},[711,2249,2251],{"class":2250},"sBMFI","pnpm",[711,2253,2254],{"class":749}," run",[711,2256,2257],{"class":749}," bench",[711,2259,2261],{"class":2260},"sHwdD","                          # all benchmarks\n",[711,2263,2264,2266,2269,2272,2274,2277],{"class":713,"line":891},[711,2265,2251],{"class":2250},[711,2267,2268],{"class":749}," exec",[711,2270,2271],{"class":749}," vitest",[711,2273,2257],{"class":749},[711,2275,2276],{"class":749}," bench\u002Fcomparison\u002F",[711,2278,2279],{"class":2260}," # vs alternatives only\n",[711,2281,2282,2284,2286,2289,2292],{"class":713,"line":942},[711,2283,2251],{"class":2250},[711,2285,2268],{"class":749},[711,2287,2288],{"class":749}," tsx",[711,2290,2291],{"class":749}," bench\u002Fscripts\u002Fsize.ts",[711,2293,2294],{"class":2260},"     # bundle size\n",[2296,2297,2298],"style",{},"html pre.shiki code .spNyl, html code.shiki .spNyl{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}html pre.shiki code .sTEyZ, html code.shiki .sTEyZ{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .sMK4o, html code.shiki .sMK4o{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .s2Zo4, html code.shiki .s2Zo4{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .swJcz, html code.shiki .swJcz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html pre.shiki code .sfazB, html code.shiki .sfazB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html pre.shiki code .sbssI, html code.shiki .sbssI{--shiki-light:#F76D47;--shiki-default:#F78C6C;--shiki-dark:#F78C6C}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html pre.shiki code .sBMFI, html code.shiki .sBMFI{--shiki-light:#E2931D;--shiki-default:#FFCB6B;--shiki-dark:#FFCB6B}html pre.shiki code .sHwdD, html code.shiki .sHwdD{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#546E7A;--shiki-default-font-style:italic;--shiki-dark:#676E95;--shiki-dark-font-style:italic}",{"title":707,"searchDepth":791,"depth":791,"links":2300},[2301,2305,2306,2307,2308,2309,2321],{"id":476,"depth":791,"text":477,"children":2302},[2303,2304],{"id":489,"depth":846,"text":490},{"id":692,"depth":846,"text":693},{"id":1217,"depth":791,"text":1218},{"id":1278,"depth":791,"text":688},{"id":1357,"depth":791,"text":1358},{"id":1440,"depth":791,"text":1441},{"id":1584,"depth":791,"text":1585,"children":2310},[2311,2312,2314,2316,2317,2318,2319,2320],{"id":1588,"depth":846,"text":643},{"id":1674,"depth":846,"text":2313},"Context accumulation (log.set())",{"id":1737,"depth":846,"text":2315},"Event emission (log.emit())",{"id":1812,"depth":846,"text":1813},{"id":1864,"depth":846,"text":61},{"id":1501,"depth":846,"text":349},{"id":1979,"depth":846,"text":1980},{"id":2033,"depth":846,"text":2034},{"id":2127,"depth":791,"text":2128,"children":2322},[2323,2324,2325],{"id":2131,"depth":846,"text":2132},{"id":2196,"depth":846,"text":2197},{"id":2222,"depth":846,"text":2223},"evlog adds ~3µs per request. Faster than pino, consola, and winston in most scenarios while emitting richer, more useful events.","md",[2329,2332],{"label":61,"icon":64,"to":62,"color":2330,"variant":2331},"neutral","subtle",{"label":426,"icon":429,"to":427,"color":2330,"variant":2331},{},{"icon":315},{"title":312,"description":2326},"P2y1W5h7NCZfbOjek7pla765FzgPeifmUTz0akEacdM",[2338,2340],{"title":426,"path":427,"stem":428,"description":2339,"icon":429,"children":-1},"Complete reference for all evlog configuration options including global logger settings, middleware options, environment context, and framework-specific overrides.",{"title":434,"path":435,"stem":436,"description":2341,"icon":437,"children":-1},"Build-time optimizations for any Vite-based framework. Auto-init, debug stripping, source location injection, and optional auto-imports.",1784142029722]