• Aliaksandr Valialkin's avatar
    cmd/compile: pack bool fields in Node, Name, Func and Type structs to bitsets · ed70f37e
    Aliaksandr Valialkin authored
    This reduces compiler memory usage by up to 4% - see compilebench
    results below.
    
    name       old time/op     new time/op     delta
    Template       245ms ± 4%      241ms ± 2%  -1.88%  (p=0.029 n=10+10)
    Unicode        126ms ± 3%      124ms ± 3%    ~     (p=0.105 n=10+10)
    GoTypes        805ms ± 2%      813ms ± 3%    ~     (p=0.515 n=8+10)
    Compiler       3.95s ± 2%      3.83s ± 1%  -2.96%  (p=0.000 n=9+10)
    MakeBash       47.4s ± 4%      46.6s ± 1%  -1.59%  (p=0.028 n=9+10)
    
    name       old user-ns/op  new user-ns/op  delta
    Template        324M ± 5%       326M ± 3%    ~     (p=0.935 n=10+10)
    Unicode         186M ± 5%       178M ±10%    ~     (p=0.067 n=9+10)
    GoTypes        1.08G ± 7%      1.09G ± 4%    ~     (p=0.956 n=10+10)
    Compiler       5.34G ± 4%      5.31G ± 1%    ~     (p=0.501 n=10+8)
    
    name       old alloc/op    new alloc/op    delta
    Template      41.0MB ± 0%     39.8MB ± 0%  -3.03%  (p=0.000 n=10+10)
    Unicode       32.3MB ± 0%     31.0MB ± 0%  -4.13%  (p=0.000 n=10+10)
    GoTypes        119MB ± 0%      116MB ± 0%  -2.39%  (p=0.000 n=10+10)
    Compiler       499MB ± 0%      487MB ± 0%  -2.48%  (p=0.000 n=10+10)
    
    name       old allocs/op   new allocs/op   delta
    Template        380k ± 1%       379k ± 1%    ~     (p=0.436 n=10+10)
    Unicode         324k ± 1%       324k ± 0%    ~     (p=0.853 n=10+10)
    GoTypes        1.15M ± 0%      1.15M ± 0%    ~     (p=0.481 n=10+10)
    Compiler       4.41M ± 0%      4.41M ± 0%  -0.12%  (p=0.007 n=10+10)
    
    name       old text-bytes  new text-bytes  delta
    HelloSize       623k ± 0%       623k ± 0%    ~     (all equal)
    CmdGoSize      6.64M ± 0%      6.64M ± 0%    ~     (all equal)
    
    name       old data-bytes  new data-bytes  delta
    HelloSize      5.81k ± 0%      5.81k ± 0%    ~     (all equal)
    CmdGoSize       238k ± 0%       238k ± 0%    ~     (all equal)
    
    name       old bss-bytes   new bss-bytes   delta
    HelloSize       134k ± 0%       134k ± 0%    ~     (all equal)
    CmdGoSize       152k ± 0%       152k ± 0%    ~     (all equal)
    
    name       old exe-bytes   new exe-bytes   delta
    HelloSize       967k ± 0%       967k ± 0%    ~     (all equal)
    CmdGoSize      10.2M ± 0%      10.2M ± 0%    ~     (all equal)
    
    Change-Id: I1f40af738254892bd6c8ba2eb43390b175753d52
    Reviewed-on: https://go-review.googlesource.com/37445Reviewed-by: 's avatarMatthew Dempsky <mdempsky@google.com>
    Run-TryBot: Matthew Dempsky <mdempsky@google.com>
    TryBot-Result: Gobot Gobot <gobot@golang.org>
    ed70f37e
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