d6e8218581
This splits the span map into separate chunks for every 64MB of the heap. The span map chunks now live in the same indirect structure as the bitmap. Updates #10460. This causes a slight improvement in compilebench and the x/benchmarks garbage benchmark. I'm not sure why it improves performance. name old time/op new time/op delta Template 185ms ± 1% 184ms ± 1% ~ (p=0.315 n=9+10) Unicode 86.9ms ± 1% 86.9ms ± 3% ~ (p=0.356 n=9+10) GoTypes 602ms ± 1% 599ms ± 0% -0.59% (p=0.002 n=9+10) Compiler 2.89s ± 0% 2.87s ± 1% -0.50% (p=0.003 n=9+9) SSA 7.25s ± 0% 7.29s ± 1% ~ (p=0.400 n=9+10) Flate 118ms ± 1% 118ms ± 2% ~ (p=0.065 n=10+9) GoParser 147ms ± 2% 147ms ± 1% ~ (p=0.549 n=10+9) Reflect 403ms ± 1% 401ms ± 1% -0.47% (p=0.035 n=9+10) Tar 176ms ± 1% 175ms ± 1% -0.59% (p=0.013 n=10+9) XML 211ms ± 1% 209ms ± 1% -0.83% (p=0.011 n=10+10) (https://perf.golang.org/search?q=upload:20171231.1) name old time/op new time/op delta Garbage/benchmem-MB=64-12 2.24ms ± 1% 2.23ms ± 1% -0.36% (p=0.001 n=20+19) (https://perf.golang.org/search?q=upload:20171231.2) Change-Id: I2563f8704ab9812434947faf293c5327f9b0d07a Reviewed-on: https://go-review.googlesource.com/85885 Run-TryBot: Austin Clements <austin@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Rick Hudson <rlh@golang.org> |
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