ref: Restore node 6 support due to yarn engine checks, add performance.now fallback#2460
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kamilogorek merged 1 commit intomasterfrom Feb 28, 2020
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ref: Restore node 6 support due to yarn engine checks, add performance.now fallback#2460kamilogorek merged 1 commit intomasterfrom
kamilogorek merged 1 commit intomasterfrom
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HazAT
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Feb 28, 2020
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awesome, thanks @kamilogorek :) |
rhcarvalho
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Feb 28, 2020
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| const performanceFallback: Pick<Performance, 'now'> = { | ||
| now(): number { | ||
| return INITIAL_TIME - Date.now(); |
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I think storing the initial time is unnecessary.
The point of using performance.now is to compute durations t1-t0; it doesn't matter to subtract yet INITIAL_TIME. And as a fallback it is limited anyway, since it is has no guarantee on being monotonic, unlike the real performance.now.
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performance.now returns a delta from start till now. We need a fallback to do the same, in behavior sense.
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ref: #2455 (comment)