On 10/08/10 00:29, Pieter Laeremans wrote:
Hello,
I'm trying some haskell scripting. I'm writing a script to print some information from a zip archive. The zip-archive library does look nice but the performance of zip-archive/lazy bytestring doesn't seem to scale.
Executing :
eRelativePath $ head $ zEntries archive
on an archive of around 12 MB with around 20 files yields
Stack space overflow: current size 8388608 bytes.
The script in question can be found at :
http://github.com/plaeremans/HaskellSnipplets/blob/master/ZipList.hs
I'm using the latest version of haskell platform. Are these libaries not production ready, or am I doing something terribly wrong ?
I downloaded your program and compiled it (GHC 6.12.1, zip-archive 0.1.1.6, bytestring 0.9.1.5). I ran it on the JVM src.zip (20MB, ~8000 files) and it sat there for a minute (67s), taking 2.2% memory according to top, then completed successfully. Same behaviour with -O2. Which compares very badly in time to the instant return when I ran unzip -l on the same file, but I didn't see any memory problems. Presumably your archive is valid and works with unzip and other tools? Thanks, Neil.