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cmd/compile: reduce PGO profile processing overhead #58102

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prattmic opened this issue Jan 26, 2023 · 1 comment
Open

cmd/compile: reduce PGO profile processing overhead #58102

prattmic opened this issue Jan 26, 2023 · 1 comment
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@prattmic
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compiler/runtime Issues related to the Go compiler and/or runtime. NeedsFix The path to resolution is known, but the work has not been done. ToolSpeed
Milestone
Go1.21

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@prattmic
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Currently, each cmd/compile invocation parses the full PGO pprof profile, builds a full weight graph, and then determines what is relevant to that package. This is a lot of work that scales poorly with the size of the profile and the size of the build (number of packages). For particularly large profiles, this can lead to extremely long build times.

Follow-up to #55022.

cc @cherrymui @aclements
@prattmic prattmic added the NeedsFix The path to resolution is known, but the work has not been done. label Jan 26, 2023
@prattmic prattmic added this to the Go1.21 milestone Jan 26, 2023
@prattmic prattmic self-assigned this Jan 26, 2023
@gopherbot gopherbot added the compiler/runtime Issues related to the Go compiler and/or runtime. label Jan 26, 2023
@aclements aclements mentioned this issue Jan 30, 2023
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Change https://go.dev/cl/464575 mentions this issue: WIP: trim profiles to only include transitive deps

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@prattmic prattmic

Labels
compiler/runtime Issues related to the Go compiler and/or runtime. NeedsFix The path to resolution is known, but the work has not been done. ToolSpeed
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Go Compiler / Runtime
Status: Todo
Milestone
Go1.21
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@prattmic @bcmills @gopherbot