scrapy 2.3 标杆管理
Scrapy提供了一个简单的基准测试套件，可以生成一个本地HTTP服务器并以最大可能的速度爬行。这个基准测试的目标是了解Scrapy在硬件中的表现，以便有一个共同的比较基准。它使用一个简单的蜘蛛，它不做任何事情，只跟踪链接。
使用它：：
scrapy bench
您应该看到这样的输出：
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)
这说明Scrapy可以在运行它的硬件中每分钟爬行大约3000页。请注意，这是一个非常简单的spider，用于跟踪链接，您编写的任何自定义spider都可能执行更多的操作，从而导致较慢的爬行速度。速度有多慢取决于你的蜘蛛做了多少，写得有多好。
将来，更多的案例将添加到基准套件中，以涵盖其他常见场景。