Benchmarking · Scrapy 1.6 中文文檔

# Benchmarking > 譯者：[OSGeo 中國](https://www.osgeo.cn/) 0.17 新版功能. Scrapy提供了一個簡單的基準測試套件，可以生成一個本地HTTP服務器并以最大可能的速度爬行。這個基準測試的目標是了解Scrapy在硬件中的表現，以便有一個共同的比較基準。它使用一個簡單的 Spider ，它不做任何事情，只跟蹤鏈接。使用它：： ```py scrapy bench ``` 您應該看到這樣的輸出： ```py 2016-12-16 21:18:48 [scrapy.utils.log] INFO: Scrapy 1.2.2 started (bot: quotesbot) 2016-12-16 21:18:48 [scrapy.utils.log] INFO: Overridden settings: {'CLOSESPIDER_TIMEOUT': 10, 'ROBOTSTXT_OBEY': True, 'SPIDER_MODULES': ['quotesbot.spiders'], 'LOGSTATS_INTERVAL': 1, 'BOT_NAME': 'quotesbot', 'LOG_LEVEL': 'INFO', 'NEWSPIDER_MODULE': 'quotesbot.spiders'} 2016-12-16 21:18:49 [scrapy.middleware] INFO: Enabled extensions: ['scrapy.extensions.closespider.CloseSpider', 'scrapy.extensions.logstats.LogStats', 'scrapy.extensions.telnet.TelnetConsole', 'scrapy.extensions.corestats.CoreStats'] 2016-12-16 21:18:49 [scrapy.middleware] INFO: Enabled downloader middlewares: ['scrapy.downloadermiddlewares.robotstxt.RobotsTxtMiddleware', 'scrapy.downloadermiddlewares.httpauth.HttpAuthMiddleware', 'scrapy.downloadermiddlewares.downloadtimeout.DownloadTimeoutMiddleware', 'scrapy.downloadermiddlewares.defaultheaders.DefaultHeadersMiddleware', 'scrapy.downloadermiddlewares.useragent.UserAgentMiddleware', 'scrapy.downloadermiddlewares.retry.RetryMiddleware', 'scrapy.downloadermiddlewares.redirect.MetaRefreshMiddleware', 'scrapy.downloadermiddlewares.httpcompression.HttpCompressionMiddleware', 'scrapy.downloadermiddlewares.redirect.RedirectMiddleware', 'scrapy.downloadermiddlewares.cookies.CookiesMiddleware', 'scrapy.downloadermiddlewares.stats.DownloaderStats'] 2016-12-16 21:18:49 [scrapy.middleware] INFO: Enabled spider middlewares: ['scrapy.spidermiddlewares.httperror.HttpErrorMiddleware', 'scrapy.spidermiddlewares.offsite.OffsiteMiddleware', 'scrapy.spidermiddlewares.referer.RefererMiddleware', 'scrapy.spidermiddlewares.urllength.UrlLengthMiddleware', 'scrapy.spidermiddlewares.depth.DepthMiddleware'] 2016-12-16 21:18:49 [scrapy.middleware] INFO: Enabled item pipelines: [] 2016-12-16 21:18:49 [scrapy.core.engine] INFO: Spider opened 2016-12-16 21:18:49 [scrapy.extensions.logstats] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min) 2016-12-16 21:18:50 [scrapy.extensions.logstats] INFO: Crawled 70 pages (at 4200 pages/min), scraped 0 items (at 0 items/min) 2016-12-16 21:18:51 [scrapy.extensions.logstats] INFO: Crawled 134 pages (at 3840 pages/min), scraped 0 items (at 0 items/min) 2016-12-16 21:18:52 [scrapy.extensions.logstats] INFO: Crawled 198 pages (at 3840 pages/min), scraped 0 items (at 0 items/min) 2016-12-16 21:18:53 [scrapy.extensions.logstats] INFO: Crawled 254 pages (at 3360 pages/min), scraped 0 items (at 0 items/min) 2016-12-16 21:18:54 [scrapy.extensions.logstats] INFO: Crawled 302 pages (at 2880 pages/min), scraped 0 items (at 0 items/min) 2016-12-16 21:18:55 [scrapy.extensions.logstats] INFO: Crawled 358 pages (at 3360 pages/min), scraped 0 items (at 0 items/min) 2016-12-16 21:18:56 [scrapy.extensions.logstats] INFO: Crawled 406 pages (at 2880 pages/min), scraped 0 items (at 0 items/min) 2016-12-16 21:18:57 [scrapy.extensions.logstats] INFO: Crawled 438 pages (at 1920 pages/min), scraped 0 items (at 0 items/min) 2016-12-16 21:18:58 [scrapy.extensions.logstats] INFO: Crawled 470 pages (at 1920 pages/min), scraped 0 items (at 0 items/min) 2016-12-16 21:18:59 [scrapy.core.engine] INFO: Closing spider (closespider_timeout) 2016-12-16 21:18:59 [scrapy.extensions.logstats] INFO: Crawled 518 pages (at 2880 pages/min), scraped 0 items (at 0 items/min) 2016-12-16 21:19:00 [scrapy.statscollectors] INFO: Dumping Scrapy stats: {'downloader/request_bytes': 229995, 'downloader/request_count': 534, 'downloader/request_method_count/GET': 534, 'downloader/response_bytes': 1565504, 'downloader/response_count': 534, 'downloader/response_status_count/200': 534, 'finish_reason': 'closespider_timeout', 'finish_time': datetime.datetime(2016, 12, 16, 16, 19, 0, 647725), 'log_count/INFO': 17, 'request_depth_max': 19, 'response_received_count': 534, 'scheduler/dequeued': 533, 'scheduler/dequeued/memory': 533, 'scheduler/enqueued': 10661, 'scheduler/enqueued/memory': 10661, 'start_time': datetime.datetime(2016, 12, 16, 16, 18, 49, 799869)} 2016-12-16 21:19:00 [scrapy.core.engine] INFO: Spider closed (closespider_timeout) ``` 這說明Scrapy可以在運行它的硬件中每分鐘爬行大約3000頁。請注意，這是一個非常簡單的spider，用于跟蹤鏈接，您編寫的任何自定義spider都可能執行更多的操作，從而導致較慢的爬行速度。速度有多慢取決于你的 Spider 做了多少，寫得有多好。將來，更多的案例將添加到基準套件中，以涵蓋其他常見場景。