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This change parallelizes the outer loop in globalReferrersPkgLevel, which loops over packages to inspect. There is also an easily parallelizable inner loop. However, parallelizing it adds complication (deffiles needs a mutex, inQueryPackage requires a wait group) and offers only a 2% speed-up. Benchmarks for this change, looking for encoding/json.MarshalIndent: name old time/op new time/op delta Referrers 5.31s ± 2% 4.67s ± 3% -11.95% (p=0.000 n=10+10) name old user-time/op new user-time/op delta Referrers 15.9s ± 2% 16.5s ± 3% +3.71% (p=0.000 n=10+10) name old sys-time/op new sys-time/op delta Referrers 15.7s ± 3% 16.1s ± 3% +2.73% (p=0.011 n=10+10) Fixes golang/go#24272 Updates golang/go#25017 This work supported by Sourcegraph. Change-Id: I5dcda9017103cdff59d0ffdf5e87d2c2c955a33a Reviewed-on: https://go-review.googlesource.com/108878 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Alan Donovan <adonovan@google.com> |
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