#288: the package indexes are very slow ---------------------------------+------------------------------------------ Reporter: duncan | Owner: Type: defect | Status: new Priority: normal | Milestone: Component: cabal-install tool | Version: HEAD Severity: normal | Keywords: Difficulty: easy (<4 hours) | Ghcversion: 6.8.2 Platform: | ---------------------------------+------------------------------------------ Comment(by duncan): The installed package index is now respectably fast. The available index is still slow. Here's one approach: instead of generating a full cache in an alternative format, generate an index of the tarball mapping package id to offset, length pairs in the uncompressed .tar file. Then we can lazily load the tarball. Ideally just mmap it and extract the offset,length slices and lazily parse. It would avoid loading the full 20+ megabytes of the full index. -- Ticket URL: http://hackage.haskell.org/trac/hackage/ticket/288#comment:3 Hackage http://haskell.org/cabal/ Hackage: Cabal and related projects