зеркало из https://github.com/mozilla/gecko-dev.git
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MozReview-Commit-ID: 6eeqvTqSxam --HG-- rename : third_party/rust/memchr/.cargo-checksum.json => third_party/rust/memchr-1.0.2/.cargo-checksum.json rename : third_party/rust/memchr/Cargo.toml => third_party/rust/memchr-1.0.2/Cargo.toml rename : third_party/rust/memchr/src/lib.rs => third_party/rust/memchr-1.0.2/src/lib.rs rename : third_party/rust/regex/.cargo-checksum.json => third_party/rust/regex-0.2.2/.cargo-checksum.json rename : third_party/rust/regex/.travis.yml => third_party/rust/regex-0.2.2/.travis.yml rename : third_party/rust/regex/CHANGELOG.md => third_party/rust/regex-0.2.2/CHANGELOG.md rename : third_party/rust/regex/Cargo.toml => third_party/rust/regex-0.2.2/Cargo.toml rename : third_party/rust/regex/HACKING.md => third_party/rust/regex-0.2.2/HACKING.md rename : third_party/rust/regex/PERFORMANCE.md => third_party/rust/regex-0.2.2/PERFORMANCE.md rename : third_party/rust/regex/README.md => third_party/rust/regex-0.2.2/README.md rename : 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third_party/rust/regex-0.2.2/src/re_unicode.rs rename : third_party/rust/regex/src/simd_accel/mod.rs => third_party/rust/regex-0.2.2/src/simd_accel/mod.rs rename : third_party/rust/regex/src/simd_accel/teddy128.rs => third_party/rust/regex-0.2.2/src/simd_accel/teddy128.rs rename : third_party/rust/regex/src/simd_fallback/mod.rs => third_party/rust/regex-0.2.2/src/simd_fallback/mod.rs rename : third_party/rust/regex/src/simd_fallback/teddy128.rs => third_party/rust/regex-0.2.2/src/simd_fallback/teddy128.rs rename : third_party/rust/regex/src/utf8.rs => third_party/rust/regex-0.2.2/src/utf8.rs rename : third_party/rust/regex/tests/api_str.rs => third_party/rust/regex-0.2.2/tests/api_str.rs rename : third_party/rust/regex/tests/bytes.rs => third_party/rust/regex-0.2.2/tests/bytes.rs rename : third_party/rust/regex/tests/crazy.rs => third_party/rust/regex-0.2.2/tests/crazy.rs rename : third_party/rust/regex/tests/macros.rs => third_party/rust/regex-0.2.2/tests/macros.rs rename : 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third_party/rust/regex-0.2.2/tests/unicode.rs rename : third_party/rust/regex/tests/word_boundary_unicode.rs => third_party/rust/regex-0.2.2/tests/word_boundary_unicode.rs rename : third_party/rust/regex-syntax/.cargo-checksum.json => third_party/rust/regex-syntax-0.4.1/.cargo-checksum.json rename : third_party/rust/regex-syntax/Cargo.toml => third_party/rust/regex-syntax-0.4.1/Cargo.toml rename : third_party/rust/regex-syntax/src/lib.rs => third_party/rust/regex-syntax-0.4.1/src/lib.rs rename : third_party/rust/regex-syntax/src/literals.rs => third_party/rust/regex-syntax-0.4.1/src/literals.rs rename : third_party/rust/regex-syntax/src/parser.rs => third_party/rust/regex-syntax-0.4.1/src/parser.rs rename : third_party/rust/regex-syntax/src/properties.rs => third_party/rust/regex-syntax-0.4.1/src/properties.rs rename : third_party/rust/regex-syntax/src/unicode.rs => third_party/rust/regex-syntax-0.4.1/src/unicode.rs extra : rebase_source : b0c643eb68b9262945345145ec1578c14369dbf7 |
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| COPYING | ||
| Cargo.toml | ||
| LICENSE-MIT | ||
| Makefile | ||
| README.md | ||
| UNLICENSE | ||
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README.md
This crate provides a safe interface libc's memchr and memrchr.
This crate also provides fallback implementations when either function is
unavailable.
Dual-licensed under MIT or the UNLICENSE.
Documentation
no_std
memchr links to the standard library by default, but you can disable the
use_std feature if you want to use it in a #![no_std] crate:
[dependencies]
memchr = { version = "1.0", default-features = false }
Performance
On my system (Linux/amd64), memchr is about an order of magnitude faster than
the more idiomatic haystack.iter().position(|&b| b == needle):
test iterator ... bench: 5,280 ns/iter (+/- 13) = 1893 MB/s
test iterator_reversed ... bench: 5,271 ns/iter (+/- 7) = 1897 MB/s
test libc_memchr ... bench: 202 ns/iter (+/- 0) = 49504 MB/s
test libc_memrchr ... bench: 197 ns/iter (+/- 1) = 50761 MB/s