diff options
| author | Bartosz Nitka <niteria@gmail.com> | 2017-06-27 12:55:17 -0400 |
|---|---|---|
| committer | Ben Gamari <ben@smart-cactus.org> | 2017-06-27 13:34:05 -0400 |
| commit | b0708588e87554899c2efc80a2d3eba353dbe926 (patch) | |
| tree | 03817b07a5c542a45d6058cf19a09efeaf5037bc /compiler/backpack | |
| parent | 6567c815135e93f8550d526f81d13f31c0cd92b6 (diff) | |
| download | haskell-b0708588e87554899c2efc80a2d3eba353dbe926.tar.gz | |
Make module membership on ModuleGraph faster
When loading/reloading with a large number of modules
(>5000) the cost of linear lookups becomes significant.
The changes here made `:reload` go from 6s to 1s on my
test case.
The bottlenecks were `needsLinker` in `DriverPipeline` and
`getModLoop` in `GhcMake`.
Test Plan: ./validate
Reviewers: simonmar, austin, bgamari
Subscribers: rwbarton, thomie
Differential Revision: https://phabricator.haskell.org/D3646
Diffstat (limited to 'compiler/backpack')
| -rw-r--r-- | compiler/backpack/DriverBkp.hs | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/compiler/backpack/DriverBkp.hs b/compiler/backpack/DriverBkp.hs index 6123bc8133..4324e5763b 100644 --- a/compiler/backpack/DriverBkp.hs +++ b/compiler/backpack/DriverBkp.hs @@ -288,7 +288,8 @@ buildUnit session cid insts lunit = do let hi_dir = expectJust (panic "hiDir Backpack") $ hiDir dflags export_mod ms = (ms_mod_name ms, ms_mod ms) -- Export everything! - mods = [ export_mod ms | ms <- mod_graph, ms_hsc_src ms == HsSrcFile ] + mods = [ export_mod ms | ms <- mgModSummaries mod_graph + , ms_hsc_src ms == HsSrcFile ] -- Compile relevant only hsc_env <- getSession @@ -660,7 +661,7 @@ hsunitModuleGraph dflags unit = do else fmap Just $ summariseRequirement pn mod_name -- 3. Return the kaboodle - return (nodes ++ req_nodes) + return $ mkModuleGraph $ nodes ++ req_nodes summariseRequirement :: PackageName -> ModuleName -> BkpM ModSummary summariseRequirement pn mod_name = do |