sreepurna sreepurnajasti

sreepurnajasti / cpu.js

Created April 27, 2017 06:21

This is a program which causes high cpu consumption of Node production anomaly

	var obj;
	var str = JSON.stringify(console);
	while (true) {
	obj = JSON.parse(str);
	str = JSON.stringify(obj);
	}

sreepurnajasti / node-command-line-options.txt

Created April 26, 2017 07:04 — forked from listochkin/node-command-line-options.txt

Node V8 GC-related options

	--log_gc (Log heap samples on garbage collection for the hp2ps tool.)
	type: bool default: false
	--expose_gc (expose gc extension)
	type: bool default: false
	--max_new_space_size (max size of the new generation (in kBytes))
	type: int default: 0
	--max_old_space_size (max size of the old generation (in Mbytes))
	type: int default: 0
	--max_executable_size (max size of executable memory (in Mbytes))
	type: int default: 0

sreepurnajasti / server.js

Created March 13, 2017 09:33

	var http = require('http');
	var fs = require('fs');

	var data = fs.readFileSync('./data.in');
	var server = http.createServer(function(req, res) {
	console.log('connected');
	res.end(data);
	});

	server.listen(25000);

sreepurnajasti / perf_modifiednode.txt

Created February 15, 2017 12:17

perf report for exp.js

	25.40%node libc-2.17.so [.] memchr
	16.84%node [kernel.kallsyms] [k] copy_user_enhanced_fast_string
	10.57%node node [.] v8::internal::StringSearch<unsigned char, unsigned char>::LinearSearch(v8::internal::StringSearch<unsigned char, unsigned char>*, v8::internal::Vector<unsigned char const>, int)
	10.40%node libc-2.17.so [.] __memcpy_ssse3_back
	4.88%node node [.] v8::internal::Factory::NewStringFromUtf8(v8::internal::Vector<char const>, v8::internal::PretenureFlag)
	1.95%node [kernel.kallsyms] [k] free_hot_cold_page
	1.77%node [kernel.kallsyms] [k] put_page
	1.05%node [kernel.kallsyms] [k] iowrite16
	1.04%node perf-27128.map [.] Builtin:RegExpPrototypeExec
	1.01%node [kernel.kallsyms] [k] __do_softirq

sreepurnajasti / exp.js

Last active February 15, 2017 12:15

A testcase which can holds to 128* 100 connections parllely and matching the data chunk with a specified word and storing its word count in a file.

	var http = require('http');
	var util = require('util');
	var fs = require("fs");

	var string = 'http://' + process.argv[2] + ':' + process.argv[3] + '/';


	var out = fs.createWriteStream('./out.txt');
	var start = process.hrtime();

sreepurnajasti / down.js

Created February 10, 2017 07:12

A test case which implements an multi-client download by calibrating the libuv loop

	var app = require('appmetrics');
	var mon = app.monitor();
	var http = require('http');
	var util = require('util');

	mon.on('eventloop', function(d) {
	console.log(Math.round(d.latency.avg));
	});

	var string = 'http://' + process.argv[2] + ':' + process.argv[3] + '/';