log-switch

Log Switch

The problem is so many logs in my program.

for (var i = 0; i < 100000; i++) {
  console.log('hello %d', i);
}

Result

hello 0
hello 1
...
hello 99998
hello 99999
[Finished in 40.6s]

Disable console.log

As you see the info, call the console.log 100,000 times takes 40.6 second. that's so bad. To avoid this situation, you can use LogSwitch to disable it.

var logs = require('log-switch');

logs.disable();

for (var i = 0; i < 100000; i++) {
  console.log('hello %d', i);
}

logs.restore();

console.log('over');

Result

over
[Finished in 0.2s]

Auto enable logs

In case the error thrown, LogsSwitch can auto print the last 10 logs.

var logs = require('log-switch');

logs.setQueueLength(10);
logs.disable();

for (var i = 0; i < 100000; i++) {
  if (i === 50000) {
    throw new Error('Error string');
  }
  console.log('hello %d', i);
}

Result

hello 49989
hello 49990
hello 49991
hello 49992
hello 49993
hello 49994
hello 49995
hello 49996
hello 49997
hello 49998
hello 49999

E:\node\log-switch\test.js:9
		throw new Error('Error string');
		^
Error: Error string
    at Error (<anonymous>)
    at new Error (E:\node\log-switch\t.js:55:22)
    at Object.<anonymous> (E:\node\log-switch\test.js:9:9)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Function.Module.runMain (module.js:497:10)
    at startup (node.js:119:16)
    at node.js:901:3

[Finished in 0.2s with exit code 8]
[cmd: node E:\node\log-switch\test.js]

Test computer

    OS    :  Microsoft Windows 7 Ultimate (x64)
Processor :  AMD64 Family 16 Model 6 Stepping 3 AuthenticAMD ~3000 Mhz