228
96%

Ran 14 Dec 2017 06:24AM UTC

Jobs 1

Files 20

Run time 1s

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Build # 228

Build Type

push

travis-ci

Committed by

web-flow

Commit Message

Add CRC32 with SSE support (#30)

This adds a CRC32 impl based on the SSE4.2 intrinsics. The hash_util::hash
function now decide at build time which hash to use. To enable the CRC32 hash,
one can pass the flags through RUSTC flag:

  RUSTFLAGS="-C target-feature=+sse4.2" cargo bench

Benchmarking shows that it can give some improvements.

Before:
test dict_i32_1k_10             ... bench:      13,915 ns/iter (+/- 313)
test dict_i32_1k_100            ... bench:      14,208 ns/iter (+/- 385)
test dict_i32_1k_1000           ... bench:      18,119 ns/iter (+/- 9,656)
test dict_i32_1m_10             ... bench:  14,113,301 ns/iter (+/- 272,263)
test dict_i32_1m_100            ... bench:  14,506,331 ns/iter (+/- 315,964)
test dict_i32_1m_1000           ... bench:  19,420,768 ns/iter (+/- 501,641)
test dict_str_1m                ... bench:  12,776,750 ns/iter (+/- 7,132,524)

After:
test dict_i32_1k_10             ... bench:      10,635 ns/iter (+/- 417)
test dict_i32_1k_100            ... bench:      10,778 ns/iter (+/- 133)
test dict_i32_1k_1000           ... bench:      16,894 ns/iter (+/- 223)
test dict_i32_1m_10             ... bench:  11,069,272 ns/iter (+/- 251,322)
test dict_i32_1m_100            ... bench:  11,080,385 ns/iter (+/- 215,262)
test dict_i32_1m_1000           ... bench:  11,445,189 ns/iter (+/- 163,009)
test dict_str_1m                ... bench:  12,963,771 ns/iter (+/- 2,493,590)

Run Details

4632 of 4853 relevant lines covered (95.45%)

0.95 hits per line

Jobs

ID	Job ID	Ran	Files	Coverage
1	228.1	14 Dec 2017 06:24AM UTC	0	95.45	Travis Job 228.1

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