Breakdown for s135.com
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  • OnPage
  • 44 / 100
  • Title: 48 characters (10 / 10)


    Nice, your website's title passed this evaluation.


  • Description: 30 characters (10 / 10)


    Nice, your website's <meta name="description"> passed this evaluation.


  • Google Authorship: no (0 / 10)


    Doh! Consider to add <link rel="author"> or <link rel="publisher"> markup to your site!


  • Robots.txt: yes (10 / 10)


    Yeeeha, we found a valid robots.txt file. Good job!


  • Sitemap.xml: no (0 / 10)


    We are sorry to say, but we could not find a valid Sitemap.xml on your website.


  • Clean redirection: no (0 / 10)


    Better check your redirects. Seems like there is a problem. Maybe you use 302 redirects or have duplicate content issues.

    If you use <link rel="canonical"> don't panic. We just don't check that for now.


  • H1 headings: 1 heading (10 / 10)


    Smashing, you really know what you are doing!


  • H2 headings: 0 headings (0 / 10)


    Make sure your website uses at least 1 but not more than 10 <H2> tags on each page and sub-page.


  • Images: We found 4 missing alt attributes (0 / 10)


    Poor you! We recognized that you have 4 images on your site not using alt attribute for the <img> tag.


  • Words: 843 words (4 / 10)


    Content is king! Seems like you allready know that. Nothing to do here!

  • OffPage
  • 2 / 100
  • DomainPOP: links (0 / 16)


    You have to build more backlinks for your website in order to rank higher.


  • Hosting location matches language: no (0 / 16)


    Website language provided in <html lang=""> and hosting location (IPv4) do not match. Maybe you just don't use the language tag.


  • Age: 1 years old (2 / 16)


    Congratulations, you have an old and trusted domain to work with.


  • Valid HTML: not valid (0 / 16)


    The HTML markup of your site is not valid. Use a validator to fix errors.


  • Facebook signals: 0 shares & likes (0 / 16)


    Try to get more shares & likes on Facebook.


  • Google+ signals: 2 +1s (0 / 16)


    Try to get more +1s on Google+.

Site details for s135.com

s135.com

Title

张宴的博客 - Web系统架构与底层研发

Description

Web系统架构与底层研发

Content preview

张宴的博客Web系统架构 与底层研发EnglishRSS我 共享技术汇总星标日 留言旅行相册首页 分页: 1/31 12345678910 [ 显示模式: 摘要 | 列表 ] PHP 真正多线程的使用[ 2013-12-17 11:17 | by 张宴 ]PHP 5.3 以上版本,使用pthreads PHP扩展,可以使PHP真正 地支持多线程。多线程 在处理重复性的循环任 务,能够大大缩短程序 执行时间。我之前的文 章中说过,大多数网站 的性能瓶颈不在PHP服务 器上,因为它可以简单 地通过横向增加服务器 或CPU核数来轻松应对( 对于各种云主机,增加 VPS或CPU核数就更方便了 ,直接以备份镜像增加 VPS,连操作系统、环境 都不用安装配置),而 是在于MySQL数据库。如 用 MySQL 数据库,一条联合查询 的SQL,也许就可以处理 完业务逻辑,但是,遇 到大量并发请求,就歇 菜了。如果用 NoSQL 数据库,也许需要十次 查询,才能处理完同样 地业务逻辑,但每次查 询都比 MySQL 要快,十次循环NoSQL查 也许比一次MySQL联合 询更快,应对几万次/ 的查询完全没问题。 果加上PHP多线程,通 十个线程同时查询NoSQ L,返回结果汇总输出 速度就要更快了。我 实际的APP产品中,调 一个通过用户喜好实 推荐商品的PHP接口,PH P需要对BigSea NoSQL数据库发起500~1000 查询,来实时算出用 的个性喜好商品数据 PHP多线程的作用非常 显。PHP扩展下载:https ://github.com/krakjoe/pthreads PHP手册文档:http://php.n et/manual/zh/bo...

Last crawl: 13.08.2015 00:10

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