{"id":974,"date":"2021-12-30T10:36:19","date_gmt":"2021-12-30T02:36:19","guid":{"rendered":"http:\/\/139.9.1.231\/?p=974"},"modified":"2021-12-30T10:36:21","modified_gmt":"2021-12-30T02:36:21","slug":"ipythontime","status":"publish","type":"post","link":"http:\/\/139.9.1.231\/index.php\/2021\/12\/30\/ipythontime\/","title":{"rendered":"\u8861\u91cf\u4ee3\u7801\u8fd0\u884c\u65f6\u95f4\u6027\u80fd\uff1a"},"content":{"rendered":"\n

%time<\/code>\u00a0\u548c\u00a0%timeit<\/code> <\/strong><\/p>\n\n\n\n

\u5bf9\u4e8e\u8ba1\u65f6\u6709\u4e24\u4e2a\u5341\u5206\u6709\u7528\u7684\u9b54\u6cd5\u547d\u4ee4\uff1a%%time<\/code>\u00a0\u548c\u00a0%timeit<\/code>. \u5982\u679c\u4f60\u6709\u4e9b\u4ee3\u7801\u8fd0\u884c\u5730\u5341\u5206\u7f13\u6162\uff0c\u800c\u4f60\u60f3\u786e\u5b9a\u662f\u5426\u95ee\u9898\u51fa\u5728\u8fd9\u91cc\uff0c\u8fd9\u4e24\u4e2a\u547d\u4ee4\u5c06\u4f1a\u975e\u5e38\u65b9\u4fbf\u3002<\/p>\n\n\n\n

1.%%time \u5c06\u4f1a\u7ed9\u51facell\u7684\u4ee3\u7801\u8fd0\u884c\u4e00\u6b21\u6240\u82b1\u8d39\u7684\u65f6\u95f4\u3002<\/p>\n\n\n\n

%%time
import time
for _ in range(1000):
time.sleep(0.01)# sleep for 0.01 seconds<\/p>\n\n\n\n

output:
CPU times: user 196 ms, sys: 21.4 ms, total: 217 ms
Wall time: 11.6 s
\u6ce8\uff1awindow \u4e0b\u597d\u50cf\u53ea\u80fd\u663e\u793a \u201cWall time\u201d, Ubuntu16.4\u53ef\u4ee5\u6b63\u5e38\u663e\u793a\uff0c\u5176\u4ed6\u7cfb\u7edf\u672a\u8fdb\u884c\u6d4b\u8bd5\u3002\u3002\u3002<\/p>\n\n\n\n

2.%time \u5c06\u4f1a\u7ed9\u51fa\u5f53\u524d\u884c\u7684\u4ee3\u7801\u8fd0\u884c\u4e00\u6b21\u6240\u82b1\u8d39\u7684\u65f6\u95f4\u3002<\/p>\n\n\n\n

import numpy
%time numpy.random.normal(size=1000)<\/p>\n\n\n\n

output:
Wall time: 1e+03 \u00b5s
3.%timeit \u4f7f\u7528Python\u7684timeit\u6a21\u5757\uff0c\u5b83\u5c06\u4f1a\u6267\u884c\u4e00\u4e2a\u8bed\u53e5100\uff0c000\u6b21(\u9ed8\u8ba4\u60c5\u51b5\u4e0b)\uff0c\u7136\u540e\u7ed9\u51fa\u8fd0\u884c\u6700\u5feb3\u6b21\u7684\u5e73\u5747\u503c\u3002<\/p>\n\n\n\n

import numpy
%timeit numpy.random.normal(size=100)<\/p>\n\n\n\n

output:
12.8 \u00b5s \u00b1 1.25 \u00b5s per loop (mean \u00b1 std. dev. of 7 runs, 100000 loops each)<\/p>\n","protected":false},"excerpt":{"rendered":"

%time\u00a0\u548c\u00a0%timeit \u5bf9\u4e8e\u8ba1\u65f6\u6709\u4e24\u4e2a\u5341\u5206\u6709\u7528\u7684\u9b54\u6cd5\u547d\u4ee4\uff1a%%time\u00a0\u548c\u00a0%timeit. \u5982\u679c\u4f60\u6709 … \u7ee7\u7eed\u9605\u8bfb\u8861\u91cf\u4ee3\u7801\u8fd0\u884c\u65f6\u95f4\u6027\u80fd\uff1a<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[8],"tags":[],"_links":{"self":[{"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/posts\/974"}],"collection":[{"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/comments?post=974"}],"version-history":[{"count":3,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/posts\/974\/revisions"}],"predecessor-version":[{"id":977,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/posts\/974\/revisions\/977"}],"wp:attachment":[{"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/media?parent=974"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/categories?post=974"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/139.9.1.231\/index.php\/wp-json\/wp\/v2\/tags?post=974"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}