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Re: How to read integers from file faster?
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From: |
Ludovic Courtès |
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Subject: |
Re: How to read integers from file faster? |
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Date: |
Sat, 31 Aug 2013 12:19:09 +0200 |
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User-agent: |
Gnus/5.130007 (Ma Gnus v0.7) Emacs/24.3 (gnu/linux) |
Andy Wingo <address@hidden> skribis:
> I just took a look at your program, which ran in 40s on my machine.
> Under callgrind it turned out that we were doing a lot of iconv stuff
> that we didn't need to do.
It’s often the case that I/O is faster if you explicitly say that the
port is UTF-8-encoded, because there’s a fast path for that (not using
iconv) in 2.0:
(with-fluids ((%default-port-encoding "UTF-8"))
(call-with-input-file file
...))
Ludo’.