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4dcf8ea1a4
Reworks nilcheck to be performed by a depth first traversal of the dominator tree, keeping an updated map of the values that have been nil-checked during the traversal. benchmark old ns/op new ns/op delta BenchmarkNilCheckDeep1-8 1242 1825 +46.94% BenchmarkNilCheckDeep10-8 2397 3942 +64.46% BenchmarkNilCheckDeep100-8 29105 24873 -14.54% BenchmarkNilCheckDeep1000-8 2742563 265760 -90.31% BenchmarkNilCheckDeep10000-8 335690119 3157995 -99.06% benchmark old MB/s new MB/s speedup BenchmarkNilCheckDeep1-8 0.81 0.55 0.68x BenchmarkNilCheckDeep10-8 4.17 2.54 0.61x BenchmarkNilCheckDeep100-8 3.44 4.02 1.17x BenchmarkNilCheckDeep1000-8 0.36 3.76 10.44x BenchmarkNilCheckDeep10000-8 0.03 3.17 105.67x benchmark old allocs new allocs delta BenchmarkNilCheckDeep1-8 9 14 +55.56% BenchmarkNilCheckDeep10-8 9 23 +155.56% BenchmarkNilCheckDeep100-8 9 113 +1155.56% BenchmarkNilCheckDeep1000-8 9 1015 +11177.78% BenchmarkNilCheckDeep10000-8 9 10024 +111277.78% benchmark old bytes new bytes delta BenchmarkNilCheckDeep1-8 432 608 +40.74% BenchmarkNilCheckDeep10-8 1008 1496 +48.41% BenchmarkNilCheckDeep100-8 8064 11656 +44.54% BenchmarkNilCheckDeep1000-8 73728 145240 +96.99% BenchmarkNilCheckDeep10000-8 737280 2144411 +190.85% Change-Id: I0f86010e9823aec04aac744fdb589b65ec8acefc Reviewed-on: https://go-review.googlesource.com/12332 Reviewed-by: David Chase <drchase@google.com> |
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