Utility function to detect if a script is blocking longer that a certain period of time. Useful when working with socket.io to make sure that heartbeats can continue to flow. Intended for debugging use only.
npm install tach
tach uses setInterval to sample the current time as a thread runs. If there is a large time difference between intervals, then we assume a thread is being blocked.
Basic:
var t = new tach(function(delay) {
// this call back will be called in the case of a block
});
t.start();
// let your script run, tach will sample the thread
fs.readFileSync('some/really/big/file');
// you can check the status of everything whenever you want
t.getBlockCount();
t.getSampleCount();
t.getSamplesSinceBlock();
t.stop();
// and tach will no longer sample your thread.
With Options:
var opts = {
// delay in milliseconds to consider a block
warnTime: 10000,
// frequency in milliseconds to sample thread
sampleTime: 500
};
var t = new tach(opts, function(delay) {
});
Copyright (c) 2014 Kiernan Tim McGowan (dropdownmenu)
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