Adam Rosenfield

United States

adamrosenfield.com

Age: 29

Software engineer from Cambridge, MA

2d
awarded Guru
Aug
20
awarded Nice Answer
Aug
20
awarded Enlightened
Aug
11
awarded Great Answer
Jul
30
awarded Populist
Jul
15
awarded Nice Question
Jul
14
awarded Popular Question
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8
awarded Yearling
Jul
8
awarded Necromancer
Jul
5
answered Makefile: what does $@~ mean?
Jul
5
comment POSIX Threads not producing speed up in C
Assuming that your machine actually has at least 4 cores available, I suspect you're seeing worse performance due to cache contention among the threads (and if you don't have 4 cores, then the problem is you have more threads than cores). Once each thread's working set blows out its core's L2 cache, it's going to start hitting the shared L3 cache, and the contention for that is going to hurt overall performance.
Jul
1
awarded Revival
Jun
29
comment How to add JPEG comments to an existing JPEG image file
@ChrisMaes: Thanks, yes, that's the same; I updated the link to a more recent version that's less likely to break in the future (hopefully).
Jun
29
revised How to add JPEG comments to an existing JPEG image file
added 6 characters in body
Jun
28
awarded Famous Question
Jun
23
awarded g++
Jun
16
answered Trouble with os.chroot()
Jun
9
awarded Supporter
Jun
5
awarded Good Answer
Jun
4
awarded Favorite Question
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