如何加快刮y

Question

我需要收集大量（确实很多）统计数据，所有必要的信息都在<script type="application/ld+json"></script>中  我在其下编写了scrapy解析器（html内的脚本），但解析速度很慢（每秒约3页）。有什么办法可以加快这个过程？理想情况下，我希望每秒看到10多个页面

spider.py：

import scrapy
import json

class Spider(scrapy.Spider):
    name = 'scrap'
    start_urls = [
                 about 10000 urls
                 ]

    def parse(self, response):
        data = json.loads(response.css('script[type="application/ld+json"]::text').extract_first())
        name = data['name']
        image = data['image']
        path = response.css('span[itemprop="name"]::text').extract()
        yield {
            'name': name,
            'image': image,
            'path': path
        }
        return

settings.py：

USER_AGENT = "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:67.0) Gecko/20100101 Firefox/67.0"
ROBOTSTXT_OBEY = False

CONCURRENT_REQUESTS = 32

DOWNLOAD_DELAY = 0.33
DEFAULT_REQUEST_HEADERS = {
   'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
   'Accept-Language': 'en',
}
EXTENSIONS = {
  'scrapy.extensions.telnet.TelnetConsole': None,
}
AUTOTHROTTLE_DEBUG = False
LOG_ENABLED = False

我的电脑规格：

16GB内存，i5 2400，固态硬盘，1GB以太网

已编辑

Answer 1

settings.py

ROBOTSTXT_OBEY = False

DOWNLOAD_DELAY = 0
DOWNLOAD_TIMEOUT = 30
RANDOMIZE_DOWNLOAD_DELAY = True

REACTOR_THREADPOOL_MAXSIZE = 128
CONCURRENT_REQUESTS = 256
CONCURRENT_REQUESTS_PER_DOMAIN = 256
CONCURRENT_REQUESTS_PER_IP = 256

AUTOTHROTTLE_ENABLED = True
AUTOTHROTTLE_START_DELAY = 1
AUTOTHROTTLE_MAX_DELAY = 0.25
AUTOTHROTTLE_TARGET_CONCURRENCY = 128
AUTOTHROTTLE_DEBUG = True

RETRY_ENABLED = True
RETRY_TIMES = 3
RETRY_HTTP_CODES = [500, 502, 503, 504, 400, 401, 403, 404, 405, 406, 407, 408, 409, 410, 429]

DOWNLOADER_MIDDLEWARES = {
    'scrapy.downloadermiddlewares.useragent.UserAgentMiddleware': None,
    'scrapy.spidermiddlewares.referer.RefererMiddleware': 80,
    'scrapy.downloadermiddlewares.retry.RetryMiddleware': 90,
    'scrapy_fake_useragent.middleware.RandomUserAgentMiddleware': 120,
    'scrapy.downloadermiddlewares.cookies.CookiesMiddleware': 130,
    'scrapy.downloadermiddlewares.httpcompression.HttpCompressionMiddleware': 810,
    'scrapy.downloadermiddlewares.redirect.RedirectMiddleware': 900,
    'scraper.middlewares.ScraperDownloaderMiddleware': 1000
}