Matthew Dempsky ca2f85fd3f cmd/compile: add indexed export format ... This CL introduces a new indexed data format for package export data. This improves on the previous (sequential) binary format by allowing the compiler to selectively (and lazily) load only the data that's actually needed for compilation. In large Go projects, the package export data can become very large due to transitive type declaration dependencies and inline function/method bodies. By lazily loading these declarations and bodies as needed, we avoid wasting time and memory processing unnecessary and/or redundant data. In the benchmarks below, "old" is -iexport=false and "new" is -iexport=true. The suffixes indicate the compiler concurrency (-c) and inlining (-l) settings used for the build (using -gcflags=all=-foo). Benchmarks were run on an HP Z620. Juju is "go build -a github.com/juju/juju/cmd/...": name old real-time/op new real-time/op delta Juju/c=1/l=0 44.0s ± 1% 38.7s ± 9% -11.97% (p=0.001 n=7+7) Juju/c=1/l=4 53.7s ± 3% 45.3s ± 4% -15.53% (p=0.001 n=7+7) Juju/c=4/l=0 39.7s ± 8% 32.0s ± 4% -19.38% (p=0.001 n=7+7) Juju/c=4/l=4 46.3s ± 4% 38.0s ± 4% -18.06% (p=0.001 n=7+7) name old user-time/op new user-time/op delta Juju/c=1/l=0 371s ± 1% 300s ± 0% -19.07% (p=0.001 n=7+6) Juju/c=1/l=4 482s ± 0% 374s ± 1% -22.37% (p=0.001 n=7+7) Juju/c=4/l=0 410s ± 1% 340s ± 1% -17.19% (p=0.001 n=7+7) Juju/c=4/l=4 532s ± 1% 424s ± 1% -20.26% (p=0.001 n=7+7) name old sys-time/op new sys-time/op delta Juju/c=1/l=0 33.4s ± 1% 28.4s ± 2% -15.02% (p=0.001 n=7+7) Juju/c=1/l=4 40.7s ± 2% 32.8s ± 3% -19.51% (p=0.001 n=7+7) Juju/c=4/l=0 39.8s ± 2% 34.4s ± 2% -13.74% (p=0.001 n=7+7) Juju/c=4/l=4 48.4s ± 2% 40.4s ± 2% -16.50% (p=0.001 n=7+7) Kubelet is "go build -a k8s.io/kubernetes/cmd/kubelet": name old real-time/op new real-time/op delta Kubelet/c=1/l=0 42.0s ± 1% 34.8s ± 1% -17.27% (p=0.008 n=5+5) Kubelet/c=1/l=4 55.4s ± 3% 45.4s ± 3% -18.06% (p=0.002 n=6+6) Kubelet/c=4/l=0 37.4s ± 3% 29.9s ± 1% -20.25% (p=0.004 n=6+5) Kubelet/c=4/l=4 48.1s ± 2% 39.0s ± 5% -18.93% (p=0.002 n=6+6) name old user-time/op new user-time/op delta Kubelet/c=1/l=0 291s ± 1% 233s ± 1% -19.96% (p=0.002 n=6+6) Kubelet/c=1/l=4 385s ± 1% 298s ± 1% -22.51% (p=0.002 n=6+6) Kubelet/c=4/l=0 325s ± 0% 268s ± 1% -17.48% (p=0.004 n=5+6) Kubelet/c=4/l=4 429s ± 1% 343s ± 1% -20.08% (p=0.002 n=6+6) name old sys-time/op new sys-time/op delta Kubelet/c=1/l=0 25.1s ± 2% 20.9s ± 4% -16.69% (p=0.002 n=6+6) Kubelet/c=1/l=4 31.2s ± 3% 24.4s ± 0% -21.67% (p=0.010 n=6+4) Kubelet/c=4/l=0 30.2s ± 2% 25.6s ± 1% -15.34% (p=0.002 n=6+6) Kubelet/c=4/l=4 37.3s ± 1% 30.9s ± 2% -17.11% (p=0.002 n=6+6) Change-Id: Ie43eb3bbe1392cbb61c86792a17a57b33b9561f0 Reviewed-on: https://go-review.googlesource.com/106796 Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Robert Griesemer <gri@golang.org>		2018-04-24 01:05:27 +00:00
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buf.go
must.go