连续不同时运行

Question

我有一个spider，它从单个页面获取地址列表和请求信息，并将地址和一些会话信息作为刮痧.FormRequest. 然而，铲运机似乎在连续运行它们。我可以这么说，因为如果你搜索10个地址需要17秒，如果你搜索20个地址，则花费的时间是32秒的两倍。由于最大的延迟只是等待响应，并且没有复杂的解析正在进行，如果它是并发运行的，那么应该再花一点时间正确吗？在

我已经试过把请求设得足够高了设置.py. 我已将dont_filter=true添加到表单请求中。但似乎还是不能让它发挥作用。还应注意的是，铲运机工作的意义上，它确实拉要求的信息。在

在设置.py在

CONCURRENT_REQUESTS_PER_DOMAIN = 20
CONCURRENT_REQUESTS_PER_IP = 20
CONCURRENT_REQUESTS = 20

在主.py在

^{pr2}$

输出

/app/WaterBill/spiders/main.py:16: ScrapyDeprecationWarning: Importing from 
scrapy.xlib.pydispatch is deprecated and will no longer be supported in 
future Scrapy versions. If you just want to connect signals use the 
from_crawler class method, otherwise import pydispatch directly if needed. 
See: https://github.com/scrapy/scrapy/issues/1762
from scrapy.xlib.pydispatch import dispatcher
2018-09-09 15:02:28 [scrapy.utils.log] INFO: Scrapy 1.5.1 started (bot: 
WaterBill)
2018-09-09 15:02:28 [scrapy.utils.log] INFO: Versions: lxml 4.2.4.0, libxml2 
2.9.8, cssselect 1.0.3, parsel 1.5.0, w3lib 1.19.0, Twisted 18.7.0, Python 
3.6.6 (default, Jul 17 2018, 11:12:33) - [GCC 6.3.0 20170516], pyOpenSSL 
18.0.0 (OpenSSL 1.1.0i  14 Aug 2018), cryptography 2.3.1, Platform Linux- 
4.9.93-linuxkit-aufs-x86_64-with-debian-9.5
2018-09-09 15:02:28 [scrapy.crawler] INFO: Overridden settings: {'BOT_NAME': 
'WaterBill', 'CONCURRENT_REQUESTS': 20, 'CONCURRENT_REQUESTS_PER_DOMAIN': 
20, 'CONCURRENT_REQUESTS_PER_IP': 20, 'NEWSPIDER_MODULE': 
'WaterBill.spiders', 'ROBOTSTXT_OBEY': True, 'SPIDER_MODULES': 
['WaterBill.spiders']}
2018-09-09 15:02:28 [scrapy.middleware] INFO: Enabled extensions:
['scrapy.extensions.corestats.CoreStats',
'scrapy.extensions.telnet.TelnetConsole',
'scrapy.extensions.memusage.MemoryUsage',
'scrapy.extensions.logstats.LogStats']
2018-09-09 15:02:28 [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.httpproxy.HttpProxyMiddleware',
'scrapy.downloadermiddlewares.stats.DownloaderStats']
2018-09-09 15:02:28 [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']
2018-09-09 15:02:28 [scrapy.middleware] INFO: Enabled item pipelines:
[]
2018-09-09 15:02:28 [scrapy.core.engine] INFO: Spider opened
2018-09-09 15:02:28 [scrapy.extensions.logstats] INFO: Crawled 0 pages (at 0 
pages/min), scraped 0 items (at 0 items/min)
2018-09-09 15:02:28 [scrapy.extensions.telnet] DEBUG: Telnet console 
listening on 127.0.0.1:6023

输出端

2018-09-09 15:03:01 [scrapy.core.engine] INFO: Closing spider (finished)
2018-09-09 15:03:01 [water] DEBUG: Scraped 19 in 0:00:32.526211 seconds
2018-09-09 15:03:01 [scrapy.statscollectors] INFO: Dumping Scrapy stats:
{'downloader/request_bytes': 198397,
'downloader/request_count': 21,
'downloader/request_method_count/GET': 1,
'downloader/request_method_count/POST': 20,
'downloader/response_bytes': 2057507,
'downloader/response_count': 21,
'downloader/response_status_count/200': 21,
'finish_reason': 'finished',
'finish_time': datetime.datetime(2018, 9, 9, 15, 3, 1, 223408),
'item_scraped_count': 19,
'log_count/DEBUG': 62,
'log_count/INFO': 7,
'memusage/max': 51474432,
'memusage/startup': 51474432,
'response_received_count': 21,
'scheduler/dequeued': 20,
'scheduler/dequeued/memory': 20,
'scheduler/enqueued': 20,
'scheduler/enqueued/memory': 20,
'start_time': datetime.datetime(2018, 9, 9, 15, 2, 28, 697197)}
2018-09-09 15:03:01 [scrapy.core.engine] INFO: Spider closed (finished)