std.zip expand: memory allocation failed
sozel at wpi.edu
Sun Oct 24 12:00:39 UTC 2021
On Friday, 15 October 2021 at 20:41:36 UTC, Selim Ozel wrote:
> I am simply trying to unzip a compressed zip file slightly over
> 1GB. The de-compressed size is about 4 GB.
> The code is very similar to what's explained in the
> documentation  and it works for smaller files.
> Anyone has a solution? Memory mapping  previously solved
> some part of my issue but expand is still throwing memory
> allocation failure.
>  https://dlang.org/phobos/std_zip.html
It turns out my computer was literally running out of memory as
the file was getting unzipped. For some reason to uncompress a
1-gig file with uncompressed size of 4-gig, Zip Archive of D-Lang
tries to use more than 16 gig of RAM. I don't know why. Maybe I
missed something. I use a Windows 10, DMD v2.091 with x86_mscoff.
My work around was to call 7z from D Lang and do the compression
over there. That worked like a charm.
It seems that zip.d  calls uncompress routine from zlib.d .
Would calling zlib uncompress by chunks solve this memory issue?
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