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| author | Bartosz Nitka <niteria@gmail.com> | 2017-05-31 10:47:03 -0700 |
|---|---|---|
| committer | Bartosz Nitka <niteria@gmail.com> | 2017-07-18 05:27:01 -0700 |
| commit | b8fec6950ad99cbf11cd22698b8d5ab35afb828f (patch) | |
| tree | da026b84ac5cfbf34c910d526fda9e106298cccb /compiler/main/HscMain.hs | |
| parent | 935acb6f0de36822b46f8444199dbc37de784af4 (diff) | |
| download | haskell-b8fec6950ad99cbf11cd22698b8d5ab35afb828f.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: thomie, rwbarton
Differential Revision: https://phabricator.haskell.org/D3703
Diffstat (limited to 'compiler/main/HscMain.hs')
| -rw-r--r-- | compiler/main/HscMain.hs | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/main/HscMain.hs b/compiler/main/HscMain.hs index 196e309caa..c514e5b017 100644 --- a/compiler/main/HscMain.hs +++ b/compiler/main/HscMain.hs @@ -184,7 +184,7 @@ newHscEnv dflags = do iserv_mvar <- newMVar Nothing return HscEnv { hsc_dflags = dflags , hsc_targets = [] - , hsc_mod_graph = [] + , hsc_mod_graph = emptyMG , hsc_IC = emptyInteractiveContext dflags , hsc_HPT = emptyHomePackageTable , hsc_EPS = eps_var |