{"id":122644,"date":"2025-03-20T23:00:19","date_gmt":"2025-03-20T21:00:19","guid":{"rendered":"https:\/\/prohoster.info\/?p=122644"},"modified":"2025-03-20T23:00:19","modified_gmt":"2025-03-20T21:00:19","slug":"proizvoditelnost-ubuntu-paketa-jq-udalos-uvelichit-v-1-9-raza-putyom-peresborki","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/proizvoditelnost-ubuntu-paketa-jq-udalos-uvelichit-v-1-9-raza-putyom-peresborki","title":{"rendered":"V\u00fdkon ubuntu bal\u00ed\u010dku jq se poda\u0159ilo zv\u00fd\u0161it 1,9kr\u00e1t rekonstrukc\u00ed","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"
Byly zve\u0159ejn\u011bny v\u00fdsledky hodnocen\u00ed vlivu na v\u00fdkon p\u0159ebudov\u00e1n\u00ed bal\u00ed\u010dk\u016f pro Ubuntu s r\u016fzn\u00fdmi mo\u017enostmi a implementacemi funkc\u00ed p\u0159id\u011blov\u00e1n\u00ed pam\u011bti. Experiment\u00e1torovi se poda\u0159ilo zv\u00fd\u0161it v\u00fdkon bal\u00ed\u010dku jq pro zpracov\u00e1n\u00ed dat ve form\u00e1tu JSON o 90 % (1,9kr\u00e1t) b\u011b\u017en\u00fdm p\u0159ebudov\u00e1n\u00edm ze stejn\u00e9ho bal\u00ed\u010dku se zdrojov\u00fdm k\u00f3dem, ani\u017e by byly provedeny zm\u011bny v samotn\u00e9m k\u00f3du. V\u00fdkon byl hodnocen m\u011b\u0159en\u00edm doby prov\u00e1d\u011bn\u00ed typov\u00e9ho filtruj\u00edc\u00edho dotazu na datech GeoJSON o velikosti 500 MB. <\/p>\n
Z\u00e1v\u011bry experimentu: <\/p>\n
\n
Varianta sestaven\u00e1 v GCC ze stejn\u00fdch zdrojov\u00fdch text\u016f s v\u00fdchoz\u00edmi p\u0159\u00edznaky se uk\u00e1zala b\u00fdt rychlej\u0161\u00ed ne\u017e bin\u00e1rn\u00ed bal\u00ed\u010dek Ubuntu o 2-4 %.\n
P\u0159epracov\u00e1n\u00ed v Clang 18 s \u00farovn\u00ed optimalizace -O3, zapnut\u00edm optimalizace p\u0159i linkov\u00e1n\u00ed (-flto) a vypnut\u00edm ladic\u00ed informace (-DNDEBUG) vedlo k 20% zrychlen\u00ed.\n
P\u0159epracov\u00e1n\u00ed se syst\u00e9mem distribuce pam\u011bti TCMalloc (p\u0159id\u00e1n\u00ed -L\/usr\/lib\/x86_64-linux-gnu -ltcmalloc_minimal do LDFLAGS) vedlo k 40% zrychlen\u00ed.\n
Nahrazen\u00ed funkc\u00ed malloc syst\u00e9my distribuce pam\u011bti tcmalloc, jemalloc a mimalloc pomoc\u00ed LD_PRELOAD=\/usr\/lib\/x86_64-linux-gnu\/lib\u2026so vedlo k n\u00e1r\u016fstu v\u00fdkonu o 27%, 29% a 44%. P\u0159i spu\u0161t\u011bn\u00ed s mimalloc, kter\u00fd vyk\u00e1zal zrychlen\u00ed o 44%, byla nastavena prom\u011bnn\u00e1 prost\u0159ed\u00ed MIMALLOC_LARGE_OS_PAGES=1.\n
P\u0159estavba bal\u00ed\u010dku s mimalloc v LDFLAGS m\u00edsto propojen\u00ed p\u0159es LD_PRELOAD vedla k urychlen\u00ed pr\u016fchodu testem o 90 %. Dal\u0161\u00ed test na zpracov\u00e1n\u00ed 2,2 GB JSON dat v 13 000 souborech tak\u00e9 uk\u00e1zal n\u00e1r\u016fst v\u00fdkonu p\u0159ibli\u017en\u011b dvakr\u00e1t. <\/ul>\n