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| author | Andreas Klebinger <klebinger.andreas@gmx.at> | 2022-09-21 02:37:43 +0200 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2022-09-28 15:07:30 -0400 |
| commit | c2d73cb47562a86da76dae217d15f0dbd2b05b0e (patch) | |
| tree | b21e9907acc5c9beae9478300cb3b3514c461b33 /testsuite | |
| parent | 9b1595c87f0c2406bb340c5e27a4a45dfcde0e2c (diff) | |
| download | haskell-c2d73cb47562a86da76dae217d15f0dbd2b05b0e.tar.gz | |
Apply some tricks to speed up core lint.
Below are the noteworthy changes and if given their impact on compiler
allocations for a type heavy module:
* Use the oneShot trick on LintM
* Use a unboxed tuple for the result of LintM: ~6% reduction
* Avoid a thunk for the result of typeKind in lintType: ~5% reduction
* lint_app: Don't allocate the error msg in the hot code path: ~4%
reduction
* lint_app: Eagerly force the in scope set: ~4%
* nonDetCmpType: Try to short cut using reallyUnsafePtrEquality#: ~2%
* lintM: Use a unboxed maybe for the `a` result: ~12%
* lint_app: make go_app tail recursive to avoid allocating the go function
as heap closure: ~7%
* expandSynTyCon_maybe: Use a specialized data type
For a less type heavy module like nofib/spectral/simple compiled with
-O -dcore-lint allocations went down by ~24% and compile time by ~9%.
-------------------------
Metric Decrease:
T1969
-------------------------
Diffstat (limited to 'testsuite')
| -rw-r--r-- | testsuite/tests/count-deps/CountDepsAst.stdout | 1 | ||||
| -rw-r--r-- | testsuite/tests/count-deps/CountDepsParser.stdout | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/testsuite/tests/count-deps/CountDepsAst.stdout b/testsuite/tests/count-deps/CountDepsAst.stdout index 423fd15533..3a6bae10fb 100644 --- a/testsuite/tests/count-deps/CountDepsAst.stdout +++ b/testsuite/tests/count-deps/CountDepsAst.stdout @@ -96,6 +96,7 @@ GHC.Data.Stream GHC.Data.Strict GHC.Data.StringBuffer GHC.Data.TrieMap +GHC.Data.Unboxed GHC.Driver.Backend GHC.Driver.Backend.Internal GHC.Driver.CmdLine diff --git a/testsuite/tests/count-deps/CountDepsParser.stdout b/testsuite/tests/count-deps/CountDepsParser.stdout index b6e55ec846..df3f46f307 100644 --- a/testsuite/tests/count-deps/CountDepsParser.stdout +++ b/testsuite/tests/count-deps/CountDepsParser.stdout @@ -96,6 +96,7 @@ GHC.Data.Stream GHC.Data.Strict GHC.Data.StringBuffer GHC.Data.TrieMap +GHC.Data.Unboxed GHC.Driver.Backend GHC.Driver.Backend.Internal GHC.Driver.Backpack.Syntax |