{"id":112509,"date":"2023-12-26T15:10:22","date_gmt":"2023-12-26T13:10:22","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/dlya-python-predlozhen-jit-kompilyator-ispolzuyushhij-tehniku-copy-and-patch"},"modified":"2023-12-26T15:10:22","modified_gmt":"2023-12-26T13:10:22","slug":"dlya-python-predlozhen-jit-kompilyator-ispolzuyushhij-tehniku-copy-and-patch","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sl\/blog\/news\/dlya-python-predlozhen-jit-kompilyator-ispolzuyushhij-tehniku-copy-and-patch","title":{"rendered":"Za Python je predlagan JIT-kompajler, ki uporablja tehniko copy-and-patch","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Brandt Bucher iz podjetja Microsoft, ki je eden od glavnih razvijalcev CPython in dela v ekipi, ki se ukvarja z izbolj\u0161anjem u\u010dinkovitosti interpreterja CPython, je objavil implementacijo JIT-kompajlerja za Python, ki uporablja tehniko Copy-and-Patch. Objava JIT sovpada z Bo\u017ei\u010dem, napoved pa je napisana v verzih. <\/p>\n

Predlagani JIT se odlikuje po zelo visoki hitrosti generiranja kode, enostavnosti vzdr\u017eevanja in popolni integraciji z interpreterjem. Predlagana metoda omogo\u010da avtomatsko preoblikovanje interpreterja, napisanega v jeziku C, v JIT-kompajler, brez lo\u010denega oblikovanja logike generiranja kode in brez ro\u010dnega ustvarjanja predstavitev v assemblerju. S takim pristopom bo odprava napake v interpreterju samodejno odpravila tudi isto te\u017eavo v JIT-u, saj se uporablja skupni generator kode. <\/p>\n

Delovanje metode Copy-and-Patch temelji na tem, da sta relokacija kode v pomnilniku pri nalaganju povezovalnikom objektnih datotek in nadomestitev strojnih navodil namesto bajtkode v JIT podobni nalogi. Pri delovanju JIT v procesu izvajanja programa se izvaja pregled ustvarjenih navodil bajtkode, in za vsako navodilo se kopira vnaprej skompilirana strojna koda v obmo\u010dje pomnilnika z izvr\u0161ljivo kodo ter tudi dinami\u010dno spreminja navodila za nadomestitev obdelanih podatkov (JIT kopira pripravljene predloge \u017ee skompiliranih funkcij in v njih nadomesti potrebne vrednosti, kot so argumenti in konstante). Pri nalaganju objektnih datotek se prav tako izvaja kopiranje strojne kode v pomnilnik in nadomestitev zunanjih simbolov. <\/p>\n

V Copy-and-Patch JIT se s pomo\u010djo LLVM sestavi objektna datoteka v formatu ELF, ki vsebuje podatke o navodilih bajtkode in informacije o potrebnih nadomestitvah podatkov. JIT nadomesti generirana navodila bajtkode, nastala med interpretacijo programa, s predstavitvami v strojni kodi, hkrati pa vstavlja potrebne podatke za izra\u010dune. Implementacija JIT zahteva kot odvisnost LLVM v fazi sestavljanja, vendar komponente v \u010dasu izvajanja niso vezane na zunanje odvisnosti in zna\u0161ajo pribli\u017eno 300 ro\u010dno napisanih vrstic v jeziku C in 3000 generiranih vrstic kode v C. <\/p>\n

V primerjavi s tradicionalnimi JIT orodji (LLVM -O0) predlagani JIT zagotavlja 100-krat hitrej\u0161o generacijo kode in 15 % hitrej\u0161o kon\u010dno kodo. V primerjavi s kompilacijo v WebAssembly (Liftoff) nov JIT generira kodo 5-krat hitreje, kon\u010dna koda pa deluje 50 % hitreje. \u010ce primerjamo nov JIT z optimiziranim JIT (LuaJIT), ki uporablja ro\u010dno napisano kodo v assemblerju, se je predlagana razli\u010dica izkazala za hitrej\u0161o v 13 od 44 testov, povpre\u010dno pa je zaostala po zmogljivosti za 35 %, ob znatnem poenostavljenju vzdr\u017eevanja in zmanj\u0161anju ravni zapletenosti izvedbe.

\r\n \"Predvajaj\r\n
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Izvor: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0411\u0440\u0430\u043d\u0434\u0442 \u0411\u0443\u043a\u0435\u0440 (Brandt Bucher) \u0438\u0437 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 Microsoft, \u0432\u0445\u043e\u0434\u044f\u0449\u0438\u0439 \u0432 \u0447\u0438\u0441\u043b\u043e core-\u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432 CPython \u0438 \u0440\u0430\u0431\u043e\u0442\u0430\u044e\u0449\u0438\u0439 \u043a\u043e\u043c\u0430\u043d\u0434\u0435, \u0437\u0430\u043d\u0438\u043c\u0430\u044e\u0449\u0435\u0439\u0441\u044f \u0443\u0432\u0435\u043b\u0438\u0447\u0435\u043d\u0438\u0435\u043c \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438 \u0438\u043d\u0442\u0435\u0440\u043f\u0440\u0435\u0442\u0430\u0442\u043e\u0440\u0430 CPython, \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e JIT-\u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0442\u043e\u0440\u0430 \u0434\u043b\u044f Python, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0449\u0443\u044e \u0442\u0435\u0445\u043d\u0438\u043a\u0443 Copy-and-Patch. \u041f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u044f JIT \u043f\u0440\u0438\u0443\u0440\u043e\u0447\u0435\u043d\u0430 \u043a \u0420\u043e\u0436\u0434\u0435\u0441\u0442\u0432\u0443 \u0438 \u0430\u043d\u043e\u043d\u0441 \u043d\u0430\u043f\u0438\u0441\u0430\u043d \u0432 \u0441\u0442\u0438\u0445\u0430\u0445. \u041f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u043d\u044b\u0439 JIT \u043f\u0440\u0438\u043c\u0435\u0447\u0430\u0442\u0435\u043b\u0435\u043d \u043e\u0447\u0435\u043d\u044c \u0432\u044b\u0441\u043e\u043a\u043e\u0439 \u0441\u043a\u043e\u0440\u043e\u0441\u0442\u044c\u044e \u0433\u0435\u043d\u0435\u0440\u0430\u0446\u0438\u0438 \u043a\u043e\u0434\u0430, \u043f\u0440\u043e\u0441\u0442\u043e\u0442\u043e\u0439 \u0441\u043e\u043f\u0440\u043e\u0432\u043e\u0436\u0434\u0435\u043d\u0438\u044f \u0438 \u043f\u043e\u043b\u043d\u043e\u0439 \u0438\u043d\u0442\u0435\u0433\u0440\u0430\u0446\u0438\u0435\u0439 \u0441 \u0438\u043d\u0442\u0435\u0440\u043f\u0440\u0435\u0442\u0430\u0442\u043e\u0440\u043e\u043c. \u041f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u043d\u044b\u0439 \u043c\u0435\u0442\u043e\u0434 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-112509","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Za Python je predlagan JIT kompilator, ki uporablja tehniko copy-and-patch | ProHoster","description":"Brandt Bucher iz Microsofta, ki je med klju\u010dnimi razvijalci CPython in dela v ekipi, ki se ukvarja z izbolj\u0161anjem zmogljivosti interpreterja CPython, je objavil implementacijo.","canonical_url":"https:\/\/prohoster.info\/sl\/blog\/news\/dlya-python-predlozhen-jit-kompilyator-ispolzuyushhij-tehniku-copy-and-patch","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"sl_SI","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u0414\u043b\u044f Python \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d JIT-\u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0442\u043e\u0440, 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