kamadorueda/alejandra 0.7.0

on GitHub

Added

• Inline comments support in binary operators:

  -      ++
  -      # subsections go last
  +      ++ # subsections go last

• Inline comments support in with and assert expressions:

  -  assert (libXft != null) -> libpng != null;
  -  # probably a bug
  -  assert stdenv.isDarwin -> libXaw != null;
  -  # fails to link otherwise
  +  assert (libXft != null) -> libpng != null; # probably a bug
  +
  +  assert stdenv.isDarwin -> libXaw != null; # fails to link otherwise
  +

• Inline comments support for if-then-else expressions:

                  if y ? ${a}
  -                then v x.${a} y.${a}
  -                # both have attr, use merge func
  -                else x.${a}
  -              # only x has attr
  +                then v x.${a} y.${a} # both have attr, use merge func
  +                else x.${a} # only x has attr

• Inline comments support for inherit expressions:

      inherit
        (callPackage ../development/tools/ocaml/ocamlformat {})
  -      ocamlformat
  -      # latest version
  +      ocamlformat # latest version
         ocamlformat_0_11_0

• Inline comments support for parenthesis expressions:

  -        || (
  -          # Accept {} for tests that are unsupported
  +        || ( # Accept {} for tests that are unsupported
            isDerivation x
            && x ? meta.timeout
          );

Changed

• Linux binaries now use mimalloc
  to provide much better performance when formatting Nixpkgs:

  • x86_64-unknown-linux-gnu, 1.3x faster,
    from 0m10.639s to 0m8.381s

  • x86_64-unknown-linux-musl, 15.8x faster,
    from 2m32.686s to 0m9.642s

  • On QEMU aarch64-unknown-linux-musl,
    4.6x faster,
    from 5m26s to 1m10s

  • On QEMU armv6l-unknown-linux-musleabihf,
    1.05x faster,
    from 8m7s to 7m41s

  • On QEMU armv7l-unknown-linux-musleabihf,
    1.15x faster,
    from 5m54s to 5m7s

  • On QEMU i686-unknown-linux-musl,
    1.07x faster,
    from 2m44s to 2m33s

• After profiling the code as suggested by
  nnethercote's perf-book
  one critical path of Alejandra was identified an optimized,
  yielding huge performance boosts:

  • x86_64-unknown-linux-gnu, 2.5x faster,
    from 0m8.381s to 0m3.410s

  • x86_64-unknown-linux-musl, 2.3x faster,
    from 0m9.642s to 0m4.134s

  • On QEMU aarch64-unknown-linux-musl,
    2.4x faster,
    from 1m10s to 0m29s

  • On QEMU armv6l-unknown-linux-musleabihf,
    1.85x faster,
    from 7m41s to 4m8.399s

  • On QEMU armv7l-unknown-linux-musleabihf,
    1.88x faster,
    from 5m7s to 2m42.595s

  • On QEMU i686-unknown-linux-musl,
    1.65x faster,
    from 2m33s to 1m32.671s

  In general this is an algorithmic improvement
  and therefore the following platforms should be faster as well
  by a similar ratio
  (not measured):

  • aarch64-apple-darwin
  • x86_64-apple-darwin

• A --threads flag, so you can pick how many formatting threads to spawn.
  Defaults to the number of logical CPUs in your system.

• Position counters were improved to offer an extra 1.13x speedup.

What's Changed

• refactor: remove unnecessary code by @kamadorueda in #204
• refactor: simplify code by @kamadorueda in #205
• refactor: mark as pub(crate) by @kamadorueda in #206
• refactor: remove unnecessary code by @kamadorueda in #207
• perf: use mimalloc by @kamadorueda in #208
• docs: simplify installation by @kamadorueda in #209
• docs: add nixpkgs installation method by @kamadorueda in #210
• perf: lazy position by @kamadorueda in #211
• feat: --threads flag by @kamadorueda in #213
• refactor: split apply by @kamadorueda in #214
• refactor: split assert or with by @kamadorueda in #215
• refactor: apply by @kamadorueda in #216
• refactor: if else by @kamadorueda in #217
• perf: O(n) update of position by @kamadorueda in #218
• refactor: solve clippy warnings by @kamadorueda in #219
• refactor: bin-op by @kamadorueda in #220
• feat: support more inline comments by @kamadorueda in #223
• feat: support more inline comments by @kamadorueda in #224
• feat: support inline comments in if-else by @kamadorueda in #225
• feat: inline comments on inherit by @kamadorueda in #226
• feat: support inline comments on parens by @kamadorueda in #227
• feat: simplify parens by @kamadorueda in #228
• feat: simplify parens by @kamadorueda in #229

Full Changelog: 0.6.0...0.7.0