Instead of using promises for limiting http requests, use node's built-in http.Agent.maxSockets. This removes the requirement of using a library or writing your own pooling code, and has the added advantage more control over what you're limiting.

agent.maxSockets

 

By default set to Infinity. Determines how many concurrent sockets the agent can have open per origin. Origin is either a 'host:port' or 'host:port:localAddress' combination.

For example:

var http = require('http');
var agent = new http.Agent({maxSockets: 5}); // 5 concurrent connections per origin
var request = http.request({..., agent: agent}, ...);

If making multiple requests to the same origin, it might also benefit you to set keepAlive to true (see docs above for more info).

Instead of using promises for limiting http requests, use node's built-in http.Agent.maxSockets. This removes the requirement of using a library or writing your own pooling code, and has the added advantage more control over what you're limiting.

agent.maxSockets

By default set to Infinity. Determines how many concurrent sockets the agent can have open per origin. Origin is either a 'host:port' or 'host:port:localAddress' combination.

For example:

var http = require('http');
var agent = new http.Agent({maxSockets: 5}); // 5 concurrent connections per origin
var request = http.request({..., agent: agent}, ...);

If making multiple requests to the same origin, it might also benefit you to set keepAlive to true (see docs above for more info).