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Commit Graph

2 Commits

Author SHA1 Message Date
Russ Cox
0de71619ce runtime: aggregate defer allocations
benchmark             old ns/op    new ns/op    delta
BenchmarkDefer              165          113  -31.52%
BenchmarkDefer10            155          103  -33.55%
BenchmarkDeferMany          216          158  -26.85%

benchmark            old allocs   new allocs    delta
BenchmarkDefer                1            0  -100.00%
BenchmarkDefer10              1            0  -100.00%
BenchmarkDeferMany            1            0  -100.00%

benchmark             old bytes    new bytes    delta
BenchmarkDefer               64            0  -100.00%
BenchmarkDefer10             64            0  -100.00%
BenchmarkDeferMany           64           66    3.12%

Fixes #2364.

R=ken2
CC=golang-dev
https://golang.org/cl/7001051
2012-12-22 14:54:39 -05:00
Russ Cox
f91cc3bdbb gc: optimize interface ==, !=
If the values being compared have different concrete types,
then they're clearly unequal without needing to invoke the
actual interface compare routine.  This speeds tests for
specific values, like if err == io.EOF, by about 3x.

benchmark                  old ns/op    new ns/op    delta
BenchmarkIfaceCmp100             843          287  -65.95%
BenchmarkIfaceCmpNil100          184          182   -1.09%

Fixes #2591.

R=ken2
CC=golang-dev
https://golang.org/cl/5651073
2012-02-11 00:19:24 -05:00