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Nick Mathewson
a66e947b8b
Use less memory for each entry in a hashtable
Our hash-table implementation stored a copy of the hash code in each element. But as we were using it, all of our hash codes were ridiculously easy to calculate: most of them were just a matter of a load and a shift. This patch lets ht-internal be built in either of two ways: one caches the hash-code for each element, and one recalculates it each time it's needed. This patch also chooses a slightly better hash code for event_debug_entry.
0. BUILDING AND INSTALLATION (Briefly) $ ./configure $ make $ make verify # (optional) $ sudo make install 1. BUILDING AND INSTALLATION (In Depth) To build libevent, type $ ./configure && make (If you got libevent from the git repository, you will first need to run the included "autogen.sh" script in order to generate the configure script.) Install as root via # make install You can run the regression tests by running $ make verify Before, reporting any problems, please run the regression tests. To enable the low-level tracing build the library as: CFLAGS=-DUSE_DEBUG ./configure [...] Standard configure flags should work. In particular, see: --disable-shared Only build static libraries --prefix Install all files relative to this directory. The configure script also supports the following flags: --enable-gcc-warnings Enable extra compiler checking with GCC. --disable-malloc-replacement Don't let applications replace our memory management functions --disable-openssl Disable support for OpenSSL encryption. --disable-thread-support Don't support multithreaded environments. 2. USEFUL LINKS: For the latest released version of Libevent, see the official website at http://monkey.org/~provos/libevent/ . There's a pretty good work-in-progress manual up at http://www.wangafu.net/~nickm/libevent-book/ . For the latest development versions of Libevent, access our Git repository via "git clone git://levent.git.sourceforge.net/gitroot/levent/libevent" You can browse the git repository online at http://levent.git.sourceforge.net/git/gitweb-index.cgi . To report bugs, request features, or submit patches to Libevent, use the Sourceforge trackers at https://sourceforge.net/tracker/?group_id=50884 . There's also a libevent-users mailing list for talking about Libevent use and development: http://archives.seul.org/libevent/users/ 3. ACKNOWLEDGMENTS The following people have helped with suggestions, ideas, code or fixing bugs: Alejo Weston Andros Adamson William Ahern Stas Bekman Ka-Hing Cheung Andrew Danforth Christopher Davis Mike Davis Shie Erlich Alexander von Gernler Artur Grabowski Aaron Hopkins Tani Hosokawa Claudio Jeker Valery Kyholodov Marko Kreen Scott Lamb Adam Langley Christopher Layne Philip Lewis David Libenzi Moshe Litvin Hagne Mahre Lubomir Marinov Nick Mathewson James Mansion Andrey Matveev Caitlin Mercer Trond Norbye Richard Nyberg Jon Oberheide Phil Oleson Dave Pacheco Tassilo von Parseval Pierre Phaneuf Ryan Phillips Jon Poland Bert JW Regeer Hanna Schroeter Kevin Springborn Ferenc Szalai Dug Song Zack Weinberg Taral propanbutan mmadia If we have forgotten your name, please contact us.
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