filecompare
Asynchronous file compare. Now using native Promises and native BufferTools (alloc and Buffer comparisons)
install
npm install --save filecompare
test
npm test
Example
var fc = require('filecompare');
var cb = function(isEqual) {
console.log("equal? :" + isEqual);
}
fc(path1,path1,cb);
command line usage
npm install -g filecompare
filecompare a.txt b.txt
Features
- perfect for high stress systems
- works with binary data
- perfect for comparing very large files
Advanced usage
Specify read size and buffer size.
var fc = require('filecompare');
var cb = function(isEqual) {
console.log("equal? :" + isEqual);
}
const readSize = 4096;
const bufferSize = 8192;
fc(path1,path1,cb,readSize, bufferSize);
Why is this useful?
Bytes are read into a small buffer, then compared.
Each step is independently asynchronous yet only steps forward after confirming buffers are identical.
This means if there is an unforseen process spike from some other processes, the file compare will exscuse itself until CPU load becomes more available. This means you can compare arbitrarily sized multi-gigabyte files all the time without worry about locking up the computer.
LICENSE
MIT