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| author | Sylvain Henry <sylvain@haskus.fr> | 2020-08-23 17:42:13 +0200 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2021-01-22 15:02:05 -0500 |
| commit | 887eb6ec23eed243604f71c025d280c0b854f4c4 (patch) | |
| tree | e4be1a7822ca5b44a3a79a940b16b82ee3637fe7 /testsuite/tests/deriving/should_compile/T14682.stderr | |
| parent | 6fbfde95d3612fdd747b9785d409dc32e3fdd744 (diff) | |
| download | haskell-887eb6ec23eed243604f71c025d280c0b854f4c4.tar.gz | |
Enhance Data instance generation
Use `mkConstrTag` to explicitly pass the constructor tag instead of
using `mkConstr` which queries the tag at runtime by querying the index
of the constructor name (a string) in the list of constructor names.
Perf improvement:
T16577(normal) ghc/alloc 11325573876.0 9249786992.0 -18.3% GOOD
Thanks to @sgraf812 for suggesting an additional list fusion fix during
reviews.
Metric Decrease:
T16577
Diffstat (limited to 'testsuite/tests/deriving/should_compile/T14682.stderr')
| -rw-r--r-- | testsuite/tests/deriving/should_compile/T14682.stderr | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/testsuite/tests/deriving/should_compile/T14682.stderr b/testsuite/tests/deriving/should_compile/T14682.stderr index 064f6a025a..c6454ccc30 100644 --- a/testsuite/tests/deriving/should_compile/T14682.stderr +++ b/testsuite/tests/deriving/should_compile/T14682.stderr @@ -74,7 +74,7 @@ Derived class instances: $tFoo :: Data.Data.DataType $cFoo :: Data.Data.Constr $tFoo = Data.Data.mkDataType "Foo" [$cFoo] - $cFoo = Data.Data.mkConstr $tFoo "Foo" [] Data.Data.Prefix + $cFoo = Data.Data.mkConstrTag $tFoo "Foo" 1 [] Data.Data.Prefix Derived type family instances: |