Stephen Montgomery-Smith wrote:
Roman Divacky wrote:
On Mon, May 28, 2007 at 11:34:24AM -0500, Stephen Montgomery-Smith wrote:
Jeremy Chadwick wrote:
On Sun, May 27, 2007 at 03:52:16PM -0500, Stephen Montgomery-Smith
wrote:
I have been thinking a lot about looking for speed increases for
"make index" and pkg_version and things like that. So for example,
in pkg_version, it calls "make -V PKGNAME" for every installed
package. Now "make -V PKGNAME" should be a speedy operation, but
the make has to load in and analyze bsd.port.mk, a quite
complicated file with about 200,000 characters in it, when all it
is needing to do is to figure out the value of the variable PKGNAME.
I have a related question, pertaining to "make all-depends-list" and
the
utter atrocity that is the make variable ALL-DEPENDS-LIST. If you
don't
know what it is, look for ^ALL-DEPENDS-LIST around line 5175, in
bsd.ports.mk.
I posted this to [EMAIL PROTECTED], but now I am realizing that it is
[EMAIL PROTECTED] that gets more responses. Anyway, here is a
multithreaded program "all-depends-list" that can get you double the
speed on dual processor systems, and even some small speed gains on
single processor systems. E.g.
all-depends-list /usr/ports/x11/xorg
http://www.math.missouri.edu/~stephen/all-depends-list.c
btw.. stehpen, when are you getting a commit bit? :) I certainly hope
that soon enough ;)
Probably not. The program seems to have a bug in it. In particular, I
didn't read the fgetln man page sufficiently well. So think of it as a
proof of concept rather than a finished product.
I'm going to rest from this stuff for a while, but I enjoyed the
exchanges and it has given me encouragement to work on it again in the
future sometime.
Stephen
fgetln(2) just scans ahead to the next newline, so the pointer to the
next line is returned and the length of the string (with newline char
included) is stored in the len variable (2nd parameter to function).
-Garrett
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