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stdlib/json.rs is written in a very inefficient style #1369

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marijnh opened this issue Dec 22, 2011 · 2 comments
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stdlib/json.rs is written in a very inefficient style #1369

marijnh opened this issue Dec 22, 2011 · 2 comments
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E-easy Call for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue. I-slow Issue: Problems and improvements with respect to performance of generated code.

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@marijnh
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marijnh commented Dec 22, 2011

It takes a very Haskell approach to parsing, cutting off piece by piece of the parsed string, and thus constantly allocating new strings. The functional style can be preserved by passing around a (@str, uint) pair with the offset as well as the string. But it'd probably be better to make it act on a stream abstraction (as in our io module), so that you can parse directly from files and sockets as well.
@kud1ing kud1ing mentioned this issue Feb 28, 2012
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@brson
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brson commented Feb 29, 2012

@erickt Do you think your recent changes fix this issue?

@kud1ing
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kud1ing commented Feb 29, 2012

I am positive @erickt resolved this, since from_str is now implemented as from_reader(io::string_reader(s))

@brson brson closed this as completed Feb 29, 2012
celinval pushed a commit to celinval/rust-dev that referenced this issue Jun 4, 2024
@tedinski
Bump to 0.6.0 (rust-lang#1369)
92155a1
Kobzol pushed a commit to Kobzol/rust that referenced this issue Dec 30, 2024
@EdwinRy
Add an "is" and rearange "We next" to "Next, we" (rust-lang#1369)
34f77d2
bors pushed a commit to rust-lang-ci/rust that referenced this issue Jan 2, 2025
@EdwinRy
Add an "is" and rearange "We next" to "Next, we" (rust-lang#1369)
46a3e18
bors added a commit to rust-lang-ci/rust that referenced this issue Feb 15, 2025
@bors
Auto merge of rust-lang#137022 - jieyouxu:bump-bootstrap-cc-cmake, r=…
b4d46e1 
…<try>

Bump bootstrap cc to 1.2.14 and cmake to 0.1.54

## Summary

Bump bootstrap's `cc` and `cmake` deps:

1. To make it easier to add new/unofficial targets. In particular, `cc` v1.2.4+ allows using env vars to pass target parameters to the `cc` crate. This was previously attempted in rust-lang#134344 but ran into macos-cross-to-iOS problems with `cmake` (and also rust-lang#136440, rust-lang#136720). See also discussions in rust-lang/cc-rs#1317.
2. Fix some flag inheritance warnings. Fixes rust-lang#136338.

## `cc` changelogs between `1.2.0` and `1.2.14`

> ## [1.2.14](rust-lang/cc-rs@cc-v1.2.13...cc-v1.2.14) - 2025-02-14
>
> ### Other
>
> - Regenerate target info ([rust-lang#1398](rust-lang/cc-rs#1398))
> - Add support for setting `-gdwarf-{version}` based on RUSTFLAGS ([rust-lang#1395](rust-lang/cc-rs#1395))
> - Add support for alternative network stack io-sock on QNX 7.1 aarch64 and x86_64 ([rust-lang#1312](rust-lang/cc-rs#1312))
>
> ## [1.2.13](rust-lang/cc-rs@cc-v1.2.12...cc-v1.2.13) - 2025-02-08
>
> ### Other
>
> - Fix cross-compiling for Apple platforms ([rust-lang#1389](rust-lang/cc-rs#1389))
>
> ## [1.2.12](rust-lang/cc-rs@cc-v1.2.11...cc-v1.2.12) - 2025-02-04
>
> ### Other
>
> - Split impl Build ([rust-lang#1382](rust-lang/cc-rs#1382))
> - Don't specify both `-target` and `-mtargetos=` on Apple targets ([rust-lang#1384](rust-lang/cc-rs#1384))
>
> ## [1.2.11](rust-lang/cc-rs@cc-v1.2.10...cc-v1.2.11) - 2025-01-31
>
> ### Other
>
> - Fix more flag inheritance ([rust-lang#1380](rust-lang/cc-rs#1380))
> - Include wrapper args. in `stdout` family heuristics to restore classifying `clang --driver-mode=cl` as `Msvc { clang_cl: true }` ([rust-lang#1378](rust-lang/cc-rs#1378))
> - Constrain `-Clto` and `-Cembed-bitcode` flag inheritance to be `clang`-only ([rust-lang#1379](rust-lang/cc-rs#1379))
> - Pass deployment target with `-m*-version-min=` ([rust-lang#1339](rust-lang/cc-rs#1339))
> - Regenerate target info ([rust-lang#1376](rust-lang/cc-rs#1376))
>
> ## [1.2.10](rust-lang/cc-rs@cc-v1.2.9...cc-v1.2.10) - 2025-01-17
>
> ### Other
>
> - Fix CC_FORCE_DISABLE=0 evaluating to true ([rust-lang#1371](rust-lang/cc-rs#1371))
> - Regenerate target info ([rust-lang#1369](rust-lang/cc-rs#1369))
> - Make hidden lifetimes explicit. ([rust-lang#1366](rust-lang/cc-rs#1366))
>
> ## [1.2.9](rust-lang/cc-rs@cc-v1.2.8...cc-v1.2.9) - 2025-01-12
>
> ### Other
>
> - Don't pass inherited PGO flags to GNU compilers (rust-lang#1363)
> - Adjusted zig cc judgment and avoided zigbuild errors([rust-lang#1360](rust-lang/cc-rs#1360)) ([rust-lang#1361](rust-lang/cc-rs#1361))
> - Fix compilation on macOS using clang and fix compilation using zig-cc ([rust-lang#1364](rust-lang/cc-rs#1364))
>
> ## [1.2.8](rust-lang/cc-rs@cc-v1.2.7...cc-v1.2.8) - 2025-01-11
>
> ### Other
>
> - Add `is_like_clang_cl()` getter (rust-lang#1357)
> - Fix clippy error in lib.rs ([rust-lang#1356](rust-lang/cc-rs#1356))
> - Regenerate target info ([rust-lang#1352](rust-lang/cc-rs#1352))
> - Fix compiler family detection issue with clang-cl on macOS ([rust-lang#1328](rust-lang/cc-rs#1328))
> - Update `windows-bindgen` dependency ([rust-lang#1347](rust-lang/cc-rs#1347))
> - Fix clippy warnings ([rust-lang#1346](rust-lang/cc-rs#1346))
>
> ## [1.2.7](rust-lang/cc-rs@cc-v1.2.6...cc-v1.2.7) - 2025-01-03
>
> ### Other
>
> - Regenerate target info ([rust-lang#1342](rust-lang/cc-rs#1342))
> - Document new supported architecture names in windows::find
> - Make is_flag_supported_inner take an &Tool ([rust-lang#1337](rust-lang/cc-rs#1337))
> - Fix is_flag_supported on msvc ([rust-lang#1336](rust-lang/cc-rs#1336))
> - Allow using Visual Studio target names in `find_tool` ([rust-lang#1335](rust-lang/cc-rs#1335))
>
> ## [1.2.6](rust-lang/cc-rs@cc-v1.2.5...cc-v1.2.6) - 2024-12-27
>
> ### Other
>
> - Don't inherit the `/Oy` flag for 64-bit targets ([rust-lang#1330](rust-lang/cc-rs#1330))
>
> ## [1.2.5](rust-lang/cc-rs@cc-v1.2.4...cc-v1.2.5) - 2024-12-19
>
> ### Other
>
> - Check linking when testing if compiler flags are supported ([rust-lang#1322](rust-lang/cc-rs#1322))
>
> ## [1.2.4](rust-lang/cc-rs@cc-v1.2.3...cc-v1.2.4) - 2024-12-13
>
> ### Other
>
> - Add support for C/C++ compiler for Neutrino QNX: `qcc` ([rust-lang#1319](rust-lang/cc-rs#1319))
> - use -maix64 instead of -m64 ([rust-lang#1307](rust-lang/cc-rs#1307))
>
> ## [1.2.3](rust-lang/cc-rs@cc-v1.2.2...cc-v1.2.3) - 2024-12-06
>
> ### Other
>
> - Improve detection of environment when compiling from msbuild or msvc ([rust-lang#1310](rust-lang/cc-rs#1310))
> - Better error message when failing on unknown targets ([rust-lang#1313](rust-lang/cc-rs#1313))
> - Optimize RustcCodegenFlags ([rust-lang#1305](rust-lang/cc-rs#1305))
>
> ## [1.2.2](rust-lang/cc-rs@cc-v1.2.1...cc-v1.2.2) - 2024-11-29
>
> ### Other
>
> - Inherit flags from rustc ([rust-lang#1279](rust-lang/cc-rs#1279))
> - Add support for using sccache wrapper with cuda/nvcc ([rust-lang#1304](rust-lang/cc-rs#1304))
> - Fix msvc stdout not shown on error ([rust-lang#1303](rust-lang/cc-rs#1303))
> - Regenerate target info ([rust-lang#1301](rust-lang/cc-rs#1301))
> - Fix compilation of C++ code for armv7-unknown-linux-gnueabihf ([rust-lang#1298](rust-lang/cc-rs#1298))
> - Fetch target info from Cargo even if `Build::target` is manually set ([rust-lang#1299](rust-lang/cc-rs#1299))
> - Fix two files with different extensions having the same object name ([rust-lang#1295](rust-lang/cc-rs#1295))
> - Allow disabling cc's ability to compile via env var CC_FORCE_DISABLE ([rust-lang#1292](rust-lang/cc-rs#1292))
> - Regenerate target info ([rust-lang#1293](rust-lang/cc-rs#1293))
>
> ## [1.2.1](rust-lang/cc-rs@cc-v1.2.0...cc-v1.2.1) - 2024-11-14
>
> ### Other
>
> - When invoking `cl -?`, set stdin to null ([rust-lang#1288](rust-lang/cc-rs#1288))

## `cmake` changelogs `0.1.51` to `0.1.54`

> ## [0.1.54](rust-lang/cmake-rs@v0.1.53...v0.1.54) - 2025-02-10
>
> ### Other
>
> - Remove workaround for broken `cc-rs` versions ([rust-lang#235](rust-lang/cmake-rs#235))
> - Be more precise in the description of `register_dep` ([rust-lang#238](rust-lang/cmake-rs#238))
>
> ## [0.1.53](rust-lang/cmake-rs@v0.1.52...v0.1.53) - 2025-01-27
>
> ### Other
>
> - Disable broken Make jobserver support on OSX to fix parallel builds ([rust-lang#229](rust-lang/cmake-rs#229))
>
> ## [0.1.52](rust-lang/cmake-rs@v0.1.51...v0.1.52) - 2024-11-25
>
> ### Other
>
> - Expose cc-rs no_default_flags for hassle-free cross-compilation ([rust-lang#225](rust-lang/cmake-rs#225))
> - Add a `success` job to CI
> - Change `--build` to use an absolute path
> - Merge pull request [rust-lang#195](rust-lang/cmake-rs#195) from meowtec/feat/improve-fail-hint
> - Improve hint for cmake not installed in Linux (code 127)
>
> ## [0.1.51](rust-lang/cmake-rs@v0.1.50...v0.1.51) - 2024-08-15
>
> ### Added
>
> - Add JOM generator support ([rust-lang#183](rust-lang/cmake-rs#183))
> - Improve visionOS support ([rust-lang#209](rust-lang/cmake-rs#209))
> - Use `Generic` for bare-metal systems ([rust-lang#187](rust-lang/cmake-rs#187))
>
> ### Fixed
>
> - Fix cross compilation on android armv7 and x86 ([rust-lang#186](rust-lang/cmake-rs#186))

try-job: dist-apple-various
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