Package: wnpp Severity: wishlist Owner: Michael Hanke <m...@debian.org>
* Package name : indexed-gzip Version : 0.1 Upstream Author : Paul D McCarthy * URL : https://github.com/pauldmccarthy/indexed_gzip * License : BSDish https://opensource.org/licenses/zlib-license.php Programming Lang: Python Description : fast random access of gzip files in Python [from the README] The indexed_gzip project is a Python extension which aims to provide a drop-in replacement for the built-in Python gzip.GzipFile class, the IndexedGzipFile. The standard gzip.GzipFile class exposes a random access-like interface (via its seek and read methods), but every time you seek to a new point in the uncompressed data stream, the GzipFile instance has to start decompressing from the beginning of the file, until it reaches the requested location. An IndexedGzipFile instance gets around this performance limitation by building an index, which contains seek points, mappings between corresponding locations in the compressed and uncompressed data streams. Each seek point is accompanied by a chunk (32KB) of uncompressed data which is used to initialise the decompression algorithm, allowing us to start reading from any seek point. If the index is built with a seek point spacing of 1MB, we only have to decompress (on average) 512KB of data to read from any location in the file. Performance comparison: https://github.com/pauldmccarthy/indexed_gzip#performance This needs to be packaged as a dependency of a replacement of the `fslview` (https://packages.debian.org/sid/fslview) package, which will not make it into the next release due to its dependencies on obsolete code (Qt4, ...). This will be maintained by the NeuroDebian team.
