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somandubey / gist:6c612f41417815422a244f63db557d2c
Created February 5, 2017 14:51
function foo(){
for (var i=1;i<6;i++) {
var f = function(i) {
var k = function(){console.log(i)};
setTimeout(k,1000*i);
}
f(i);
}
}
foo();
@somandubey
somandubey / tuning_nginx_nodejs
Created August 29, 2014 20:47 — forked from carlessistare/tuning_nginx_nodejs
# This number should be, at maximum, the number of CPU cores on your system.
# (since nginx doesn't benefit from more than one worker per CPU.)
worker_processes 8;
# Determines how many clients will be served by each worker process.
# (Max clients = worker_connections * worker_processes)
# "Max clients" is also limited by the number of socket connections available on the system (~64k)
# run ss -s and u'll see a timewait param
# The reason for TIMED_WAIT is to handle the case of packets arriving after the socket is closed.
@somandubey
somandubey / gist:52bff8c7cc8639292629
Created August 28, 2014 19:56
How to increase ulimit in Linux

How to increase ulimit in Linux:

  • Step 1 (ulimit): open the sysctl.conf and add this line fs.file-max = 65536

      vi /etc/sysctl.conf

    add following at end of file in above file:

      fs.file-max = 65536

save and exit.

@somandubey
somandubey / node-and-npm-in-30-seconds.sh
Created August 28, 2014 08:07 — forked from isaacs/node-and-npm-in-30-seconds.sh
echo 'export PATH=$HOME/local/bin:$PATH' >> ~/.bashrc
. ~/.bashrc
mkdir ~/local
mkdir ~/node-latest-install
cd ~/node-latest-install
curl http://nodejs.org/dist/node-latest.tar.gz | tar xz --strip-components=1
./configure --prefix=~/local
make install # ok, fine, this step probably takes more than 30 seconds...
curl https://www.npmjs.org/install.sh | sh