O projeto GNU lan\u00e7ou a vers\u00e3o 1.14 do pacote gzip, que inclui as utilidades gzip, gunzip, zmore e zcat para comprimir e descomprimir dados usando o algoritmo LZ77. Nesta nova vers\u00e3o, as opera\u00e7\u00f5es de descompress\u00e3o foram significativamente aceleradas. Em sistemas x86_64 que suportam instru\u00e7\u00f5es de processador PCLMUL, o ganho de desempenho alcan\u00e7a 40%, enquanto em sistemas sem suporte para PCLMUL, o ganho \u00e9 de at\u00e9 20%. <\/p>\n
A acelera\u00e7\u00e3o foi poss\u00edvel devido \u00e0 otimiza\u00e7\u00e3o das opera\u00e7\u00f5es com somas de verifica\u00e7\u00e3o (CRC), que consumiam cerca de metade do tempo de CPU. A vers\u00e3o otimizada do CRC j\u00e1 foi integrada \u00e0 biblioteca gnulib, o que resultar\u00e1 em um aumento de desempenho em outros projetos do GNU que utilizam fun\u00e7\u00f5es de c\u00e1lculo de soma de verifica\u00e7\u00e3o. <\/p>\n
Foram feitas altera\u00e7\u00f5es que quebram a compatibilidade: a instala\u00e7\u00e3o da utilidade zmore foi descontinuada em plataformas que n\u00e3o utilizam a utilidade \u00abmore\u00bb; o processamento da vari\u00e1vel de ambiente GZIP (que define as op\u00e7\u00f5es padr\u00e3o) foi descontinuado em situa\u00e7\u00f5es onde as op\u00e7\u00f5es \u00ab-1\u00bb (\u2014fast), \u00ab-2\u00bb,\u2026 \u00ab-9\u00bb (\u2014best), \u00ab\u2014rsyncable\u00bb ou \u00ab\u2014synchronous\u00bb n\u00e3o est\u00e3o explicitamente especificadas. <\/p>\n
Al\u00e9m disso, pode-se notar: <\/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\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\udd47 Lan\u00e7amento das ferramentas GNU grep 3.12, gzip 1.14, diffutils 3.12 e coreutils 9.7 | ProHoster","description":"O projeto GNU lan\u00e7ou a vers\u00e3o 1.14 do pacote gzip, que inclui as ferramentas gzip, gunzip, zmore e zcat para compress\u00e3o e descompress\u00e3o de dados usando o algoritmo LZ77. 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\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 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