Il progetto GNU ha pubblicato la versione 1.14 del pacchetto gzip, che include gli strumenti gzip, gunzip, zmore e zcat per la compressione e decompressione dei dati utilizzando l'algoritmo LZ77. In questa nuova versione, le operazioni di decompressione sono state significativamente accelerate. Su sistemi x86_64 che supportano le istruzioni del processore PCLMUL, il guadagno sulle prestazioni raggiunge il 40%, mentre su sistemi senza supporto PCLMUL arriva fino al 20%. <\/p>\n
L'accelerazione \u00e8 stata realizzata grazie all'ottimizzazione delle operazioni con le somme di controllo (CRC), il cui calcolo richiedeva circa met\u00e0 del tempo di elaborazione della CPU. La versione ottimizzata del CRC \u00e8 gi\u00e0 stata inclusa nella libreria gnulib, il che porter\u00e0 a un'accelerazione anche di altri progetti GNU che utilizzano le funzioni di calcolo delle somme di controllo. <\/p>\n
Sono state apportate modifiche che interrompono la compatibilit\u00e0: l'installazione dello strumento zmore \u00e8 stata interrotta su piattaforme che non utilizzano lo strumento \u00abmore\u00bb; l'elaborazione della variabile d'ambiente GZIP (che imposta le opzioni predefinite) non avverr\u00e0 quando non sono esplicitamente specificate le opzioni \u00ab-1\u00bb (\u2212fast), \u00ab-2\u00bb,\u2026 \u00ab-9\u00bb (\u2212best), \u00ab\u2212rsyncable\u00bb o \u00ab\u2212synchronous\u00bb. <\/p>\n
In aggiunta si pu\u00f2 notare: <\/p>\n
\u041f\u0440\u043e\u0435\u043a\u0442 GNU \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b \u0440\u0435\u043b\u0438\u0437 \u043f\u0430\u043a\u0435\u0442\u0430 gzip 1.14, \u0432\u043a\u043b\u044e\u0447\u0430\u044e\u0449\u0435\u0433\u043e \u0443\u0442\u0438\u043b\u0438\u0442\u044b gzip, gunzip, zmore \u0438 zcat \u0434\u043b\u044f \u0441\u0436\u0430\u0442\u0438\u044f \u0438 \u0440\u0430\u0441\u043f\u0430\u043a\u043e\u0432\u043a\u0438 \u0434\u0430\u043d\u043d\u044b\u0445 \u043f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c\u0430 LZ77. \u0412 \u043d\u043e\u0432\u043e\u043c \u0432\u044b\u043f\u0443\u0441\u043a\u0435 \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0435\u043d\u043d\u043e \u0443\u0441\u043a\u043e\u0440\u0435\u043d\u044b \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438 \u0440\u0430\u0441\u043f\u0430\u043a\u043e\u0432\u043a\u0438. \u041d\u0430 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445 x86_64, \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u044e\u0449\u0438\u0445 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u043d\u044b\u0435 \u0438\u043d\u0441\u0442\u0440\u0443\u043a\u0446\u0438\u0438 PCLMUL, \u043f\u0440\u0438\u0440\u043e\u0441\u0442 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438 \u0434\u043e\u0441\u0442\u0438\u0433\u0430\u0435\u0442 40%, \u0430 \u043d\u0430 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445 \u0431\u0435\u0437 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0438 PCLMUL — \u0434\u043e 20%. \u0423\u0441\u043a\u043e\u0440\u0435\u043d\u0438\u0435 \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u043e \u0431\u043b\u0430\u0433\u043e\u0434\u0430\u0440\u044f \u043e\u043f\u0442\u0438\u043c\u0438\u0437\u0430\u0446\u0438\u0438 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0439 […]<\/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-123469","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\udd47Rilascio degli strumenti GNU grep 3.12, gzip 1.14, diffutils 3.12 e coreutils 9.7 | ProHoster","description":"Il progetto GNU ha pubblicato il rilascio del pacchetto gzip 1.14, che include gli strumenti gzip, gunzip, zmore e zcat per la compressione e decompressione dei dati utilizzando l'algoritmo LZ77. 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