mirror of
https://github.com/rust-lang/cargo
synced 2024-08-28 11:50:23 +00:00
6babe72e7c
This commit fixes a performance pathology in Cargo today. Whenever Cargo generates a lock file (which happens on all invocations of `cargo build` for example) Cargo will parse the crates.io index to learn about dependencies. Currently, however, when it parses a crate it parses the JSON blob for every single version of the crate. With a lock file, however, or with incremental builds only one of these lines of JSON is relevant. Measured today Cargo building Cargo parses 3700 JSON dependencies in the registry. This commit implements an optimization that brings down the number of parsed JSON lines in the registry to precisely the right number necessary to build a project. For example Cargo has 150 crates in its lock file, so now it only parses 150 JSON lines (a 20x reduction from 3700). This in turn can greatly improve Cargo's null build time. Cargo building Cargo dropped from 120ms to 60ms on a Linux machine and 400ms to 200ms on a Mac. The commit internally has a lot more details about how this is done but the general idea is to have a cache which is optimized for Cargo to read which is maintained automatically by Cargo. Closes #6866
115 lines
2.5 KiB
TOML
115 lines
2.5 KiB
TOML
[package]
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name = "cargo"
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version = "0.37.0"
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edition = "2018"
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authors = ["Yehuda Katz <wycats@gmail.com>",
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"Carl Lerche <me@carllerche.com>",
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"Alex Crichton <alex@alexcrichton.com>"]
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license = "MIT OR Apache-2.0"
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homepage = "https://crates.io"
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repository = "https://github.com/rust-lang/cargo"
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documentation = "https://docs.rs/cargo"
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description = """
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Cargo, a package manager for Rust.
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"""
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[lib]
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name = "cargo"
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path = "src/cargo/lib.rs"
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[dependencies]
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atty = "0.2"
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byteorder = "1.2"
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bytesize = "1.0"
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crates-io = { path = "src/crates-io", version = "0.25" }
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crossbeam-utils = "0.6"
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crypto-hash = "0.3.1"
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curl = { version = "0.4.21", features = ['http2'] }
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curl-sys = "0.4.18"
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env_logger = "0.6.0"
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pretty_env_logger = { version = "0.3", optional = true }
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failure = "0.1.5"
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filetime = "0.2"
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flate2 = { version = "1.0.3", features = ['zlib'] }
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fs2 = "0.4"
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git2 = "0.8.0"
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git2-curl = "0.9.0"
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glob = "0.3.0"
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hex = "0.3"
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home = "0.3"
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ignore = "0.4"
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lazy_static = "1.2.0"
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jobserver = "0.1.13"
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lazycell = "1.2.0"
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libc = "0.2"
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log = "0.4.6"
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libgit2-sys = "0.7.9"
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memchr = "2.1.3"
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num_cpus = "1.0"
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opener = "0.3.0"
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rustfix = "0.4.4"
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same-file = "1"
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semver = { version = "0.9.0", features = ["serde"] }
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serde = { version = "1.0.82", features = ['derive'] }
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serde_ignored = "0.0.4"
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serde_json = { version = "1.0.30", features = ["raw_value"] }
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shell-escape = "0.1.4"
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tar = { version = "0.4.18", default-features = false }
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tempfile = "3.0"
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termcolor = "1.0"
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toml = "0.5.0"
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url = "1.1"
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url_serde = "0.2.0"
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walkdir = "2.2"
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clap = "2.31.2"
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unicode-width = "0.1.5"
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openssl = { version = '0.10.11', optional = true }
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im-rc = "12.1.0"
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# A noop dependency that changes in the Rust repository, it's a bit of a hack.
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# See the `src/tools/rustc-workspace-hack/README.md` file in `rust-lang/rust`
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# for more information.
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rustc-workspace-hack = "1.0.0"
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[target.'cfg(target_os = "macos")'.dependencies]
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core-foundation = { version = "0.6.0", features = ["mac_os_10_7_support"] }
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[target.'cfg(windows)'.dependencies]
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miow = "0.3.1"
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fwdansi = "1"
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[target.'cfg(windows)'.dependencies.winapi]
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version = "0.3"
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features = [
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"basetsd",
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"handleapi",
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"jobapi",
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"jobapi2",
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"memoryapi",
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"minwindef",
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"ntdef",
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"ntstatus",
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"processenv",
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"processthreadsapi",
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"psapi",
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"synchapi",
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"winerror",
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"winbase",
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"wincon",
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"winnt",
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]
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[dev-dependencies]
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bufstream = "0.1"
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proptest = "0.9.1"
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[[bin]]
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name = "cargo"
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test = false
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doc = false
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[features]
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deny-warnings = []
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vendored-openssl = ['openssl/vendored']
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pretty-env-logger = ['pretty_env_logger']
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