I’m talking about performance here, same program, same compiler options, gcc on CentOS6 generate much better executable than gcc on CentOS5, the gap is 10~15%.<\/p>\n
I think gcc makes the most difference, as changing glibc etc. does not make too many difference. It seems gcc did pretty good job from 4.1 to 4.4, I will dig into details whenever I have time.<\/p>\n","protected":false},"excerpt":{"rendered":"
I’m talking about performance here, same program, same compiler options, gcc on CentOS6 generate much better executable than gcc on CentOS5, the gap is 10~15%. I think gcc makes the most difference, as changing glibc etc. does not make too many difference. It seems gcc did pretty good job from 4.1 to 4.4, I will […]<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[321,141],"_links":{"self":[{"href":"https:\/\/xiehang.com\/blog\/wp-json\/wp\/v2\/posts\/1309"}],"collection":[{"href":"https:\/\/xiehang.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/xiehang.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/xiehang.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/xiehang.com\/blog\/wp-json\/wp\/v2\/comments?post=1309"}],"version-history":[{"count":1,"href":"https:\/\/xiehang.com\/blog\/wp-json\/wp\/v2\/posts\/1309\/revisions"}],"predecessor-version":[{"id":1310,"href":"https:\/\/xiehang.com\/blog\/wp-json\/wp\/v2\/posts\/1309\/revisions\/1310"}],"wp:attachment":[{"href":"https:\/\/xiehang.com\/blog\/wp-json\/wp\/v2\/media?parent=1309"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xiehang.com\/blog\/wp-json\/wp\/v2\/categories?post=1309"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xiehang.com\/blog\/wp-json\/wp\/v2\/tags?post=1309"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}