Mid-stack inlining in the Go compiler

Re:Mid-stack inlining in the Go compiler by lazard on Monday March 06, 2017 @01:43PM (#13804963)

The compiler got a bit slower:

https://github.com/golang/go/issues/19386

Those numbers are just for my CLs that fix stack traces but with mid-stack inlining still off. Turning it on makes builds noticeably slower:

    $ time ./make.bash
    real: 45.32s  user: 118.67s  cpu: 5.85s

    $ time GO_GCFLAGS='-l=4' ./make.bash
    real: 64.51s  user: 167.04s  cpu: 7.12s

We'll need to tweak the inlining heuristic to find a good balance between performance, build times, and binary size.

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Re:Mid-stack inlining in the Go compiler by simonz05 on Monday March 06, 2017 @01:57PM (#13805060)

But then the compiler gets faster once you compile it with these new improvements. Is that accounted for in the issue?

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Re:Mid-stack inlining in the Go compiler by Sunset on Monday March 06, 2017 @04:48PM (#13806352)

Please have a switch where I can sacrifice build time for maximum possible runtime benefits.

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Re:Mid-stack inlining in the Go compiler by chriswarbo on Monday March 06, 2017 @05:24PM (#13806620)

The compile-time/run-time tradeoff is interesting. Getting the "maximum possible runtime benefits" probably calls for https://en.wikipedia.org/wiki/Superoptimization :)

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