Technically the main concern may be the size of the unmarshalled pyc files in memory, more than the storage size of disk.
On Fri, 7 May 2021, 23:04 Antoine Pitrou, <[email protected]> wrote: > On Fri, 7 May 2021 22:45:38 +0100 > Pablo Galindo Salgado <[email protected]> wrote: > > > > The cost of this is having the start column number and end column number > > information for every bytecode instruction > > and this is what we want to discuss (there is also some stack cost to > > re-raise exceptions but that's not a big problem in > > any case). Given that column numbers are not very big compared with line > > numbers, we plan to store these as unsigned chars > > or unsigned shorts. We ran some experiments over the standard library and > > we found that the overhead of all pyc files is: > > > > * If we use shorts, the total overhead is ~3% (total size 28MB and the > > extra size is 0.88 MB). > > * If we use chars. the total overhead is ~1.5% (total size 28 MB and the > > extra size is 0.44MB). > > More generally, if some people in 2021 are still concerned with the size > of pyc files (why not), how about introducing a new version of the pyc > format with built-in LZ4 compression? > > LZ4 decompression is extremely fast on modern CPUs (several GB/s) and > vendoring the C library should be simple. > https://github.com/lz4/lz4 > > Regards > > Antoine. > > > _______________________________________________ > Python-Dev mailing list -- [email protected] > To unsubscribe send an email to [email protected] > https://mail.python.org/mailman3/lists/python-dev.python.org/ > Message archived at > https://mail.python.org/archives/list/[email protected]/message/PQZ6OTWG6K6W65YXRLKEH7UOD5FM24TN/ > Code of Conduct: http://python.org/psf/codeofconduct/ >
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