698b956a9f
Use escape_default() for strings in LitKind::token().
This avoids converting every char to \u{...} form, which bloats the
resulting strings unnecessarily. It also provides consistency with the
existing escape_default() calls in LitKind::token() used for raw
string literals, char literals, and raw byte char literals.
There are two benefits from this change.
- Compilation is faster. Most of the rustc-perf benchmarks see a
non-trivial speedup, particularly for incremental rebuilds, with the
best speedup over 13%, and multiple others over 10%.
- Generated rlibs are smaller. An extreme example is libfutures.rlib,
which shrinks from 2073306 bytes to 1765927 bytes, a 15% reduction.
r? @jseyfried
<details><summary>Here are full numbers for all the rustc-perf runs where the improvement was > 1%.</summary>
```
regex-check
avg: -11.1% min: -13.4% max: -5.5%
futures-check
avg: -7.6% min: -11.4% max: -3.5%
futures-opt
avg: -6.3% min: -10.3% max: -2.3%
futures
avg: -6.6% min: -10.3% max: -2.8%
regex-opt
avg: -4.7% min: -10.2% max: -0.4%
regex
avg: -5.3% min: -10.2% max: -1.2%
hyper-check
avg: -4.8% min: -6.6% max: -2.7%
encoding-check
avg: -4.1% min: -5.5% max: -2.5%
issue-46449-check
avg: -4.7% min: -5.2% max: -4.1%
clap-rs-check
avg: -2.9% min: -5.2% max: -1.1%
hyper
avg: -3.0% min: -5.1% max: -0.8%
parser-check
avg: -4.2% min: -4.9% max: -3.2%
hyper-opt
avg: -2.6% min: -4.9% max: -0.3%
encoding-opt
avg: -2.3% min: -4.6% max: -0.5%
encoding
avg: -2.5% min: -4.4% max: -0.6%
issue-46449
avg: -2.3% min: -4.4% max: -1.8%
issue-46449-opt
avg: -1.7% min: -4.3% max: -0.9%
clap-rs-opt
avg: -1.6% min: -4.2% max: -0.2%
serde-check
avg: -1.4% min: -4.1% max: -0.2%
clap-rs
avg: -1.6% min: -3.9% max: -0.7%
unify-linearly-check
avg: -3.2% min: -3.7% max: -2.7%
serde
avg: -1.1% min: -3.5% max: -0.1%
regression-31157-check
avg: -2.6% min: -3.4% max: -1.6%
helloworld-check
avg: -2.5% min: -3.4% max: -0.6%
serde-opt
avg: -1.3% min: -3.3% max: -0.5%
tokio-webpush-simple-check
avg: -2.4% min: -3.2% max: -1.8%
piston-image-check
avg: -1.7% min: -3.2% max: -0.9%
deeply-nested-opt
avg: -1.5% min: -3.0% max: -0.6%
deeply-nested-check
avg: -1.9% min: -2.9% max: -0.4%
deeply-nested
avg: -1.9% min: -2.9% max: -1.2%
syn-check
avg: -1.8% min: -2.8% max: -0.6%
coercions
avg: -0.5% min: -2.8% max: 0.4%
syn-opt
avg: -0.9% min: -2.4% max: -0.1%
syn
avg: -1.1% min: -2.2% max: -0.3%
parser-opt
avg: -1.9% min: -2.1% max: -1.6%
parser
avg: -1.9% min: -2.1% max: -1.6%
style-servo-check
avg: -1.3% min: -2.0% max: -0.8%
regression-31157-opt
avg: -0.8% min: -2.0% max: 0.0%
piston-image
avg: -0.7% min: -1.8% max: -0.2%
piston-image-opt
avg: -0.6% min: -1.8% max: -0.0%
regression-31157
avg: -1.0% min: -1.7% max: -0.3%
html5ever-opt
avg: -0.6% min: -1.5% max: -0.1%
unify-linearly-opt
avg: -1.3% min: -1.5% max: -1.1%
unify-linearly
avg: -1.3% min: -1.4% max: -1.2%
tokio-webpush-simple-opt
avg: -0.4% min: -1.2% max: -0.0%
helloworld-opt
avg: -1.0% min: -1.1% max: -0.6%
helloworld
avg: -1.0% min: -1.1% max: -0.7%
inflate-opt
avg: -0.3% min: -1.1% max: 0.1%
html5ever-check
avg: -0.6% min: -1.0% max: -0.3%
inflate-check
avg: -0.3% min: -1.0% max: -0.1%
```
</details>
|
||
|---|---|---|
| .. | ||
| bootstrap | ||
| build_helper | ||
| ci | ||
| dlmalloc@c99638dc2e | ||
| doc | ||
| etc | ||
| grammar | ||
| jemalloc@1f5a28755e | ||
| liballoc | ||
| liballoc_jemalloc | ||
| liballoc_system | ||
| libarena | ||
| libbacktrace | ||
| libcompiler_builtins@2a2f6d96c8 | ||
| libcore | ||
| libfmt_macros | ||
| libgraphviz | ||
| liblibc@a7e78a78e1 | ||
| libpanic_abort | ||
| libpanic_unwind | ||
| libproc_macro | ||
| libprofiler_builtins | ||
| librustc | ||
| librustc_allocator | ||
| librustc_apfloat | ||
| librustc_asan | ||
| librustc_borrowck | ||
| librustc_cratesio_shim | ||
| librustc_data_structures | ||
| librustc_driver | ||
| librustc_errors | ||
| librustc_incremental | ||
| librustc_lint | ||
| librustc_llvm | ||
| librustc_lsan | ||
| librustc_metadata | ||
| librustc_mir | ||
| librustc_msan | ||
| librustc_passes | ||
| librustc_platform_intrinsics | ||
| librustc_plugin | ||
| librustc_privacy | ||
| librustc_resolve | ||
| librustc_save_analysis | ||
| librustc_target | ||
| librustc_traits | ||
| librustc_trans | ||
| librustc_trans_utils | ||
| librustc_tsan | ||
| librustc_typeck | ||
| librustdoc | ||
| libserialize | ||
| libstd | ||
| libstd_unicode | ||
| libsyntax | ||
| libsyntax_ext | ||
| libsyntax_pos | ||
| libterm | ||
| libtest | ||
| libunwind | ||
| llvm@7243155b1c | ||
| llvm-emscripten@2717444753 | ||
| rtstartup | ||
| rustc | ||
| rustllvm | ||
| stdsimd@1ea18a5cb4 | ||
| test | ||
| tools | ||
| Cargo.lock | ||
| Cargo.toml | ||
| README.md | ||
| stage0.txt | ||
This directory contains the source code of the rust project, including:
rustcand its testslibstd- Various submodules for tools, like rustdoc, rls, etc.
For more information on how various parts of the compiler work, see the rustc guide.
Their is also useful content in the following READMEs, which are gradually being moved over to the guide:
- https://github.com/rust-lang/rust/tree/master/src/librustc/ty/maps
- https://github.com/rust-lang/rust/tree/master/src/librustc/dep_graph
- https://github.com/rust-lang/rust/blob/master/src/librustc/infer/region_constraints
- https://github.com/rust-lang/rust/tree/master/src/librustc/infer/higher_ranked
- https://github.com/rust-lang/rust/tree/master/src/librustc/infer/lexical_region_resolve