Turck vs APC benchmark
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A quick comparison of Turck MMCache versus the current APC for running MediaWiki.
Methodology
[edit]Test methodology: 'ab -n 100' simple single-thread benchmark from another machine on the local network. Used a copy of w:en:Zuiderzee Works. Tests done both 'straight' (parser cache hit) and with ?action=purge (to force rendering). Each pass involved restarting the web server with the configuration, then for each of the cache-hit and forced-render versions running the ab twice. First run was discarded, second run recorded.
This was done for each of turck, no opcode cache, and APC, then a second set afterwards.
As connection and transfer times are negligible on the local network (within margin of rounding error), only the 'Total' line was recorded here.
Details
[edit]- machine: 2.0 GHz Athlon XP 2400+, 512MB
- os: Ubuntu Linux "Hoary Hedgehog"
- MediaWiki CVS HEAD as of 2005-09-20; configured with memcached backing
- Apache 2.0.53 from Ubuntu package
- PHP 4.3.10 from Ubuntu package
- memcached 1.1.11 from Ubuntu package
- Turck 2.4.6 from Ubuntu package
- APC 3.0.8 compiled and installed with PEAR installer
Results
[edit] Connnection Times (ms)
min mean[+/-sd] median max
turck cache 1: 64 77 27.6 68 231
turck cache 2: 66 75 24.9 68 203
apc cache 2: 69 78 21.4 72 193
apc cache 1: 69 78 22.5 72 237
plain cache 1: 202 221 38.0 207 367
plain cache 2: 202 221 39.4 207 391
Connnection Times (ms)
min mean[+/-sd] median max
turck purge 2: 309 330 31.0 317 429
turck purge 1: 311 331 33.5 318 507
apc purge 2: 326 337 17.7 332 467
apc purge 1: 329 349 38.7 335 518
plain purge 1: 463 492 48.5 469 652
plain purge 2: 464 498 47.7 472 691
Conclusions
[edit]APC seems to be doing pretty well in performance; in my quick tests above it comes quite close to the traditional leader (Turck), but it's actively maintained. The current version of APC is claimed to work on PHP 5 and 5.1 as well.
I haven't tested for stability, fragility, etc, nor have I tested yet on PHP 5 or on x86_64; these should get done. Also comparison against the current eAccelerator might be worthwhile.