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do not use performance.timeOrigin and calculate origins lazily #2464

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Merged
tim-smart merged 2 commits into from
Jun 23, 2026
+11 −5
Merged

do not use performance.timeOrigin and calculate origins lazily #2464

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206cac8
do not use performance.timeOrigin and calculate origins lazily
tim-smart Jun 23, 2026
336fa13
use Date.now for hrtime origin
tim-smart Jun 23, 2026
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5 changes: 5 additions & 0 deletions .changeset/short-stamps-throw.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
"effect": patch
---

do not use performance.timeOrigin and calculate origins lazily
11 changes: 6 additions & 5 deletions packages/effect/src/internal/effect.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -5810,11 +5810,12 @@ const performanceNowNanos = (function() {
const bigint1e6 = BigInt(1_000_000)
if (typeof performance === "undefined" || typeof performance.now === "undefined") {
return () => BigInt(Date.now()) * bigint1e6
} else if (typeof performance.timeOrigin === "number" && performance.timeOrigin === 0) {
return () => BigInt(Math.round(performance.now() * 1_000_000))
}
const origin = (BigInt(Date.now()) * bigint1e6) - BigInt(Math.round(performance.now() * 1_000_000))
return () => origin + BigInt(Math.round(performance.now() * 1_000_000))
let origin: bigint
return () => {
origin ??= (BigInt(Date.now()) * bigint1e6) - BigInt(Math.round(performance.now() * 1_000_000))
return origin + BigInt(Math.round(performance.now() * 1_000_000))
}
})()
const processOrPerformanceNow = (function() {
const processHrtime =
Expand All @@ -5824,7 +5825,7 @@ const processOrPerformanceNow = (function() {
if (!processHrtime) {
return performanceNowNanos
}
const origin = performanceNowNanos() - processHrtime.bigint()
const origin = (BigInt(Date.now()) * BigInt(1e6)) - processHrtime.bigint()
return () => origin + processHrtime.bigint()
})()

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