node.js benchmark not smooth

Question

I write a simple page like this

var connect = require('connect');

connect.createServer(
  connect.router(function(app){
    app.get('/no-db', function(req, res, next){
       res.end(JSON.stringify({/* object here*/}));
    });
  })
).listen(3000);

when I run

ab -c 100 -n 10000 http://127.0.0.1:3000/no-db

it process the request, sometimes fast, sometimes slow, sometimes just stopped, very unstable.

what does this mean? I am using Mac OS X lion.

score 0 · Answer 1 · answered Dec 12 '11 at 02:30

0

it could be garbage collection, you should check if you memory req is going up very fast then falling very fast. If it does you are creating a lot of objects.

answered Dec 12 '11 at 02:30

christkv

4,370
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are there any optimization tips for GC? – guilin 桂林 Dec 12 '11 at 11:52

score 0 · Answer 2 · answered Feb 20 '12 at 01:12

0

There is a bug in ab on Mac OS X Lion (7.3.x)

This is not an issue with Node.js

Basically, install a patched version of ab

You can reference the similar problem here

A patching guide is here here

This frustrated me to no end! Good luck :-)

answered Feb 20 '12 at 01:12

EhevuTov

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node.js benchmark not smooth

2 Answers2