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Don't round to page size if the entire buffer will fit, otherwise this generates one extra pass of a tiny chunk.

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Con Kolivas 2011-02-24 11:38:31 +11:00
parent a0ab78ba8d
commit 8bf60c3114
1 changed files with 8 additions and 4 deletions
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12
rzip.c
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@ -773,14 +773,18 @@ void rzip_fd(int fd_in, int fd_out)
control.max_mmap = MIN(control.max_mmap, two_gig);
round_to_page(&control.max_mmap);
/* Set maximum chunk size to 2/3 of ram */
control.max_chunk = control.ramsize / 3 * 2;
/* Set maximum chunk size to 2/3 of ram if not unlimited or specified
* by a control window. When it's smaller than the file size, round it
* to page size for efficiency. */
if (UNLIMITED)
control.max_chunk = control.st_size;
if (control.window)
else if (control.window)
control.max_chunk = MIN(control.max_chunk, control.window * CHUNK_MULTIPLE);
round_to_page(&control.max_chunk);
else
control.max_chunk = control.ramsize / 3 * 2;
control.max_mmap = MIN(control.max_mmap, control.max_chunk);
if (control.max_mmap < control.st_size)
round_to_page(&control.max_chunk);
if (!STDIN)
st->chunk_size = MIN(control.max_chunk, len);