diff options
| author | Andreas Klebinger <klebinger.andreas@gmx.at> | 2019-10-20 02:30:01 +0200 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2019-10-23 05:59:04 -0400 |
| commit | 6beea836094383eea96b15e526f31b5426aea630 (patch) | |
| tree | eedb44be3fa4f86d085f3cfa2bb905b13cefccf4 /compiler/ghci | |
| parent | 9c1f0f7c384eb2e38911b9a9b083ecda0970a060 (diff) | |
| download | haskell-6beea836094383eea96b15e526f31b5426aea630.tar.gz | |
Make dynflag argument for withTiming pure.
19 times out of 20 we already have dynflags in scope.
We could just always use `return dflags`. But this is in fact not free.
When looking at some STG code I noticed that we always allocate a
closure for this expression in the heap. Clearly a waste in these cases.
For the other cases we can either just modify the callsite to
get dynflags or use the _D variants of withTiming I added which
will use getDynFlags under the hood.
Diffstat (limited to 'compiler/ghci')
| -rw-r--r-- | compiler/ghci/ByteCodeGen.hs | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/compiler/ghci/ByteCodeGen.hs b/compiler/ghci/ByteCodeGen.hs index 2ad089903b..b7b0d95217 100644 --- a/compiler/ghci/ByteCodeGen.hs +++ b/compiler/ghci/ByteCodeGen.hs @@ -86,7 +86,7 @@ byteCodeGen :: HscEnv -> Maybe ModBreaks -> IO CompiledByteCode byteCodeGen hsc_env this_mod binds tycs mb_modBreaks - = withTiming (pure dflags) + = withTiming dflags (text "ByteCodeGen"<+>brackets (ppr this_mod)) (const ()) $ do -- Split top-level binds into strings and others. @@ -158,7 +158,7 @@ coreExprToBCOs :: HscEnv -> CoreExpr -> IO UnlinkedBCO coreExprToBCOs hsc_env this_mod expr - = withTiming (pure dflags) + = withTiming dflags (text "ByteCodeGen"<+>brackets (ppr this_mod)) (const ()) $ do -- create a totally bogus name for the top-level BCO; this |