#2089: reading the package db is slow
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Reporter: duncan | Owner:
Type: compile-time performance bug | Status: new
Priority: normal | Milestone: 6.10 branch
Component: Driver | Version: 6.8.2
Severity: minor | Resolution:
Keywords: | Difficulty: Moderate (1 day)
Testcase: | Architecture: x86_64 (amd64)
Os: Multiple |
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Changes (by simonmar):
* difficulty: => Moderate (1 day)
* milestone: => 6.10 branch
Comment:
The scheme we discussed before is something like this:
* `ghc-pkg` would automatically generate a binary cache of the package DB
whenever it changed.
* we want to transition to using a directory of files for the package DB,
where
a new package can be installed by dropping a file into it and running
`ghc-pkg update` to update the binary cache.
The main sticking point here is what binary library to use. In GHC we
have our own binary library, but it currently isn't available for `ghc-
pkg` - we'd have to extract it, which is difficult because it has
dependencies on other GHC datatypes, or use a different binary library.
If GHC were first modified to use `Data.Binary` for its interface files,
this would be a lot easier.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2089#comment:1>
GHC <http://www.haskell.org/ghc/>
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