exp/html: add some tokenizer and parser benchmarks.
$GOROOT/src/pkg/exp/html/testdata/go1.html is an execution of the
$GOROOT/doc/go1.html template by godoc.
Sample numbers on my linux,amd64 desktop:
BenchmarkParser 500
4699198 ns/op 16.63 MB/s
--- BENCH: BenchmarkParser
parse_test.go:409: 1 iterations, 14653 mallocs per iteration
parse_test.go:409: 100 iterations, 14651 mallocs per iteration
parse_test.go:409: 500 iterations, 14651 mallocs per iteration
BenchmarkRawLevelTokenizer 2000 904957 ns/op 86.37 MB/s
--- BENCH: BenchmarkRawLevelTokenizer
token_test.go:657: 1 iterations, 28 mallocs per iteration
token_test.go:657: 100 iterations, 28 mallocs per iteration
token_test.go:657: 2000 iterations, 28 mallocs per iteration
BenchmarkLowLevelTokenizer 2000
1134300 ns/op 68.91 MB/s
--- BENCH: BenchmarkLowLevelTokenizer
token_test.go:657: 1 iterations, 41 mallocs per iteration
token_test.go:657: 100 iterations, 41 mallocs per iteration
token_test.go:657: 2000 iterations, 41 mallocs per iteration
BenchmarkHighLevelTokenizer 1000
2096179 ns/op 37.29 MB/s
--- BENCH: BenchmarkHighLevelTokenizer
token_test.go:657: 1 iterations, 6616 mallocs per iteration
token_test.go:657: 100 iterations, 6616 mallocs per iteration
token_test.go:657: 1000 iterations, 6616 mallocs per iteration
R=rsc
CC=andybalholm, golang-dev, r
https://golang.org/cl/
6257067