Add the URL path prefix to the static module of connect.

ArticleDirectory

• The purest official helloworld
• The purest connect helloworld
• Add the URL path prefix of a static file
• Love

It is estimated that we will naturally use the static file module static according to the official example when using connect:

 
VaR connect = require ('connect '); Connect (connect. static (_ dirname), function (req, Res) {res. writehead (200, {'content-type': 'text/plain '}); Res. end ('Hello world \ n ');}). listen (8124); console. log ('server running at http: // 127.0.0.1: 8124 /');
 

Benchmark performance

To evaluateStaticPerformance, we need another benchmark comparison.

The purest official helloworld

We use the helloworld provided in the official nodejs documentation for the most basic reference:

Ar HTTP = require ('http'); http. createserver (function (request, response) {response. writehead (200, {'content-type': 'text/plain '}); response. end ('Hello world \ n ');}). listen (8124); console. log ('server running at http: // 127.0.0.1: 8124 /');
 

The purest connect helloworld

Do not use any middleware Module

 
VaR connect = require ('connect '); Connect (function (req, Res) {res. writehead (200, {'content-type': 'text/plain '}); Res. end ('Hello world \ n ');}). listen (8124); console. log ('server running at http: // 127.0.0.1: 8124 /');
 

Connect helloworld with domain Module

VaR connect = require ('connect '); var createdomain = require ('domain '). create; Connect (function (req, res, next) {var domain = createdomain (); domain. on ('error', function (ERR) {console. log ('errrrrr ', err); Res. status Code = 500; Res. end (err. message + '\ n'); domain. dispose () ;}); domain. run (next) ;}, function (req, res, next) {If (req. url = '/error') {process. nexttick (function () {res. end ('params: '+ req. query. ABC) ;}); return ;}res. writehead (200, {'content-type': 'text/plain '}); Res. end ('Hello world \ n ');}). listen (8124); console. log ('server running at http: // 127.0.0.1: 8124 /');
 

Test Results

Official purest helloworld: 7851.56 QPS

$ Siege-B-C10-t10s http: // 127.0.0.1: 8124/** siege 2.72 ** preparing 10 concurrent users for battle. the server is now under siege... lifting the server siege... done. transactions: 78123 hitsavailability: 100.00% elapsed time: 9.95 secsdata transferred: 0.89 mbresponse time: 0.00 secstransaction rate: 7851.56 TRANS/seconds: 0.09 MB/secconcurrency: 9.93 rows transactions: 78123 failed transactions: 0 longest transaction: 0.09 MAID: 0.00
 

Pure connect helloworld: 6808.19 QPS

$ Siege-B-C10-t10s http: // 127.0.0.1: 8124/** siege 2.72 ** preparing 10 concurrent users for battle. the server is now under siege... lifting the server siege... done. transactions: 78123 hitsavailability: 100.00% elapsed time: 9.95 secsdata transferred: 0.89 mbresponse time: 0.00 secstransaction rate: 7851.56 TRANS/seconds: 0.09 MB/secconcurrency: 9.93 rows transactions: 78123 failed transactions: 0 longest transaction: 0.09 MAID: 0.00
 

Connect helloworld: 5601.35 QPS using domain Module

Domain demo for Express

$ Siege-B-C10-t10s http: // 127.0.0.1: 8124/** siege 2.72 ** preparing 10 concurrent users for battle. the server is now under siege... lifting the server siege... done. transactions: 65699 hitsavailability: 100.00% elapsed time: 9.65 secsdata transferred: 0.75 mbresponse time: 0.00 secstransaction rate: 6808.19 TRANS/seconds: 0.08 MB/secconcurrency: 9.96 rows transactions: 65699 failed transactions: 0 longest transaction: 0.05 MAID: 0.00
 

Connect helloworld with static values: 3636.98 QPS

$ Siege-B-C10-t10s http: // 127.0.0.1: 8124/** siege 2.72 ** preparing 10 concurrent users for battle. the server is now under siege... lifting the server siege... done. transactions: 34915 hitsavailability: 100.00% elapsed time: 9.60 secsdata transferred: 0.40 mbresponse time: 0.00 secstransaction rate: 3636.98 TRANS/seconds: 0.04 MB/secconcurrency: 9.97 rows transactions: 34915 failed transactions: 0 longest transaction: 0.06 MAID: 0.00
 

Why is the performance reduced by 50%?

Dizzy, why is the performance reduced by 50% with the static module added?

View static. Send ()Source code:

// "Hidden" fileif (! Hidden &&'. '= basename (PATH) [0]) return next (); FS. stat (path, function (ERR, STAT) {// MIME type = mime. lookup (PATH); // ignore enoent if (ERR) {If (FN) return FN (ERR); Return ('enoent' = err. code | 'enabledlong' = err. code )? Next (): Next (ERR); // redirect directory in case index.html is present} else if (Stat. isdirectory () {If (! Redirect) return next (); Res. status Code = 301; Res. setheader ('location', URL. pathname + '/'); Res. end ('redirecting to '+ URL. pathname + '/'); return ;}
 

The static module needs file IO every time to determine whether the file exists. This is a waste of performance.

Add the URL path prefix of a static file

Now that the performance problem is located, the problem can be solved. The right remedy does not require all requests to be processed statically.

Add a URL prefix to the static statement, for example/Public/images/logo.jpgOnly URL requests with a prefix of/public need to be processed in the static module.

So what we improvedCodeIt should be like this:

VaR connect = require ('connect '); var APP = connect (); app. use ('/public', connect. static (_ dirname); app. use (function (req, Res) {res. writehead (200, {'content-type': 'text/plain '}); Res. end ('Hello world \ n ');}). listen (8124); console. log ('server running at http: // 127.0.0.1: 8124 /');
 

What is the performance? Wow 6749.03 QPS, almost the same as connect hellowrold. Done!

$ Siege-B-C10-t10s http: // 127.0.0.1: 8124/** siege 2.72 ** preparing 10 concurrent users for battle. the server is now under siege... lifting the server siege... done. transactions: 66073 hitsavailability: 100.00% elapsed time: 9.79 secsdata transferred: 0.76 mbresponse time: 0.00 secstransaction rate: 6749.03 TRANS/seconds: 0.08 MB/secconcurrency: 9.97 rows transactions: 66073 failed transactions: 0 longest transaction: 0.03 MAID: 0.00
 

To reproduce the previous performance problems, access/public/Foo.

$ Siege-B-C10-t10s http: // 127.0.0.1: 8124/public/Foo ** siege 2.72 ** preparing 10 concurrent users for battle. the server is now under siege... lifting the server siege... done. transactions: 37773 hitsavailability: 100.00% elapsed time: 9.59 secsdata transferred: 0.43 mbresponse time: 0.00 secstransaction rate: 3938.79 TRANS/seconds: 0.05 MB/secconcurrency: 9.97 rows transactions: 37773 failed transactions: 0 longest transaction: 0.05 MAID: 0.00
 

Love

Remember to add a URL path prefix to connect. Static!

^_^ I hope this article will be useful to you.

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