{"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\/ro\/blog\/news\/dlya-python-predlozhen-jit-kompilyator-ispolzuyushhij-tehniku-copy-and-patch","title":{"rendered":"Pentru Python a fost propus un compilator JIT care utilizeaz\u0103 tehnica copy-and-patch","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Brandt Bucher de la Microsoft, unul dintre dezvoltatorii esen\u021biali ai CPython, care lucreaz\u0103 \u00een echipa responsabil\u0103 cu cre\u0219terea performan\u021bei interpretului CPython, a publicat o implementare a compilatorului JIT pentru Python, folosind tehnica Copy-and-Patch. Publica\u021bia JIT este lansat\u0103 de Cr\u0103ciun \u0219i anun\u021bul este scris \u00een versuri. <\/p>\n

JIT-ul propus se remarc\u0103 printr-o vitez\u0103 extrem de mare de generare a codului, u\u0219urin\u021ba mentenan\u021bei \u0219i integrarea complet\u0103 cu interpretul. Metoda propus\u0103 permite transformarea automat\u0103 a interpretului, scris \u00een C, \u00eentr-un compilator JIT, f\u0103r\u0103 a necesita formare separat\u0103 a logicii de generare a codului \u0219i f\u0103r\u0103 a crea manual reprezent\u0103ri de asamblare. Prin aceast\u0103 abordare, corectarea erorilor \u00een interpret este automat\u0103 \u0219i se va reflecta \u0219i \u00een JIT, deoarece se folose\u0219te un generator comun de cod. <\/p>\n

Metoda Copy-and-Patch se bazeaz\u0103 pe faptul c\u0103 relocarea codului \u00een memorie la \u00eenc\u0103rcarea fi\u0219ierelor obiect \u0219i \u00eenlocuirea instruc\u021biunilor ma\u0219in\u0103 \u00een locul bytecode-ului \u00een JIT sunt sarcini similare. \u00cen timpul execu\u021biei programului, JIT-ul parcurge instruc\u021biunile bytecode generate de interpret \u0219i copiaz\u0103 pentru fiecare instruc\u021biune codul ma\u0219in\u0103 precompilat \u00een zona de memorie cu codul executabil, precum \u0219i modific\u0103 instruc\u021biunile pe parcursul execu\u021biei pentru a \u00eenlocui datele procesate (JIT copiaz\u0103 \u0219abloane gata precompilate \u0219i le completeaz\u0103 cu valorile necesare, cum ar fi argumentele \u0219i constantele). \u00cen momentul \u00eenc\u0103rc\u0103rii fi\u0219ierelor obiect, se efectueaz\u0103, de asemenea, copierea codului ma\u0219in\u0103 \u00een memorie \u0219i \u00eenlocuirea simbolurilor externe. <\/p>\n

\u00cen Copy-and-Patch JIT, un fi\u0219ier obiect \u00een format ELF este compilat cu ajutorul LLVM, con\u021bin\u00e2nd date despre instruc\u021biunile bytecode \u0219i informa\u021bii despre \u00eenlocuirea necesar\u0103 a datelor. JIT-ul \u00eenlocuie\u0219te instruc\u021biile bytecode generate \u00een timpul interpret\u0103rii programului cu reprezent\u0103ri \u00een codul ma\u0219in\u0103, \u00een acela\u0219i timp complet\u00e2nd datele necesare pentru calcule. Implementarea JIT necesit\u0103 LLVM ca dependen\u021b\u0103 \u00een timpul compil\u0103rii, dar componentele de runtime nu depind de alte biblioteci externe \u0219i constau \u00een aproximativ 300 de linii de cod scrise manual \u00een C \u0219i 3000 de linii de cod C generate. <\/p>\n

Comparativ cu un instrument JIT tradi\u021bional (LLVM -O0), JIT-ul propus ofer\u0103 o generare a codului de 100 de ori mai rapid\u0103 \u0219i un cod rezultat cu 15% mai rapid. Comparativ cu compilarea \u00een WebAssembly (Liftoff), noul JIT genereaz\u0103 cod de 5 ori mai rapid, iar codul rezultat func\u021bioneaz\u0103 cu 50% mai repede. Dac\u0103 compar\u0103m noul JIT cu JIT-ul optimizator (LuaJIT), care folose\u0219te cod scris manual \u00een asamblor, varianta propus\u0103 s-a dovedit a fi mai rapid\u0103 \u00een 13 din cele 44 de teste, iar \u00een medie a fost cu 35% mai lent, av\u00e2nd totodat\u0103 o simplificare semnificativ\u0103 a \u00eentre\u021binerii \u0219i o reducere a nivelului de complexitate al implement\u0103rii.

\r\n \"Reda\u021bi\r\n
<\/div>\r\n <\/div><\/center>
\n
Sursa: opennet.ro<\/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\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\udd47A fost propus un compilator JIT pentru Python, utiliz\u00e2nd tehnica copy-and-patch | ProHoster","description":"Brandt Bucher de la Microsoft, parte a echipei de dezvoltatori de baz\u0103 pentru CPython \u0219i lucr\u00e2nd \u00eempreun\u0103 cu echipa dedicat\u0103 cre\u0219terii performan\u021bei interpretului CPython, a publicat o implementare.","canonical_url":"https:\/\/prohoster.info\/ro\/blog\/news\/dlya-python-predlozhen-jit-kompilyator-ispolzuyushhij-tehniku-copy-and-patch","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"ro_RO","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 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