1746e711ad
These benchmarks demonstrate that the nilcheckelim pass is roughly O(n^2): BenchmarkNilCheckDeep1 2000000 741 ns/op 1.35 MB/s BenchmarkNilCheckDeep10 1000000 2237 ns/op 4.47 MB/s BenchmarkNilCheckDeep100 20000 60713 ns/op 1.65 MB/s BenchmarkNilCheckDeep1000 200 7925198 ns/op 0.13 MB/s BenchmarkNilCheckDeep10000 1 1220104252 ns/op 0.01 MB/s Profiling suggests that building the dominator tree is also O(n^2), and before size factors take over, considerably more expensive than nilcheckelim. Change-Id: If966b38ec52243a25f355dab871300d29db02e16 Reviewed-on: https://go-review.googlesource.com/11520 Reviewed-by: Keith Randall <khr@golang.org>
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