On 11/7/2012 10:33 AM, luigi scarso wrote:
On Wed, Nov 7, 2012 at 10:07 AM, Hans Hagen <[email protected]
<mailto:[email protected]>> wrote:
On 11/7/2012 1:50 AM, Reinhard Kotucha wrote:
What I don't grok is why it's 20 times slower to load a file at once
than in little chunks. But what I'm mostly concerned about is
memory
consumption. In xosview I can see that the garbage collector
reduces
the consumed memory from time to time, but it doesn't seem to be
overly hungry. Even worse, I have the impression that memory
consumption grows exponentially with time. With a slightly larger
test file my system (4GB RAM) would certainly run out of memory.
I think 20 times is somewhat off at your end because here I get this:
Out of memory here with a testfile of 662M
Linux 32bit, 4GByte, PAE extension
# time ./read_blocks.lua
real 0m2.458s
user 0m0.372s
sys 0m1.084s
# time ./read_whole_file.lua
not enough memory
real 0m17.125s
user 0m11.737s
sys 0m4.292s
# texlua -v
This is LuaTeX, Version beta-0.70.1-2012052416 (rev 4277)
Indeed not enough mem on my laptop for a 600M+ test.
Windows 8, 32 bit:
-- all 1.082 34176584 120272.328125
-- chunked 0.668 34176584 169908.59667969
-- once 1.065 34176584 111757.03710938
-- all 7.078 136706337 535063.34863281
-- chunked 3.441 136706337 787195.56933594
-- once 6.621 136706337 501559.83691406
the larger values for 'all' and 'once' still puzzle me.
Hans
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