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cmd/compile: 1.15 heap allocations regression when calling Write on os.Stdout [1.14 backport] #41542

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gopherbot opened this issue Sep 21, 2020 · 1 comment
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cmd/compile: 1.15 heap allocations regression when calling Write on os.Stdout [1.14 backport] #41542

gopherbot opened this issue Sep 21, 2020 · 1 comment
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CherryPickCandidate Used during the release process for point releases FrozenDueToAge
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Go1.14.10

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@gopherbot
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@ianlancetaylor requested issue #41474 to be considered for backport to the next 1.14 minor release.

@gopherbot Please open a backport issue for 1.15.

This is an unexpected and unavoidable performance regression in 1.15: using Write to write a []byte forces the []byte to escape into the heap. That did not happen in 1.14.
@gopherbot gopherbot added the CherryPickCandidate Used during the release process for point releases label Sep 21, 2020
@gopherbot gopherbot mentioned this issue Sep 21, 2020
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@gopherbot gopherbot added this to the Go1.14.10 milestone Sep 21, 2020
@mdempsky
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Bad bot.

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Go1.14.10
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@mdempsky @gopherbot