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Debugging & Profiling Node.js

This is a maintained listing of all the different ways to debug and profile Node.js applications. If there is something missing or an improvement, post a comment! :)

Interactive Stack Traces with traceGL - Shareware

1. Guide here

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#!/bin/bash

HOSTNAME="${COLLECTD_HOSTNAME:-`hostname -f`}"
INTERVAL="${COLLECTD_INTERVAL:-10}"

while sleep "$INTERVAL"
do

info=$(curl http://myriak/stats -H "accept: text/plain")

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Backend Architectures

Twitter

ror, scala, jetty, erlang, thrift, mongrel, comet server, my-sql, memchached, varnish, kestrel(mq), starling, gizzard, cassandra, hadoop, vertica, munin, nagios, awstats

• Scaling Twitter: Making Twitter 10000 Percent Faster
• Scaling Twitter
• Blaine Cook on Scaling Twitter - YouTube

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package main

func main() {
	// ... setup ...

	l, err := net.Listen("tcp", *laddr)
	if err != nil {
		log.Fatal(err)
	}

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about
admin
blog
calendar
contact
copyright
dashboard
email
errors
events

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(ns handler
  (:require [clj-time.core :as t]
            [clj-time.coerce :as t.c]
            [spec-tools.conform :as conform]
            [clojure.spec.alpha :as s]
            [spec-tools.core :as st]
            [compojure.api.sweet :refer :all]
            [ring.util.http-response :refer :all]))

(def timestamp

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Effective Engineer - Notes

• By Edmond Lau
• Highly Recommended 👍
• http://www.theeffectiveengineer.com/

What's an Effective Engineer?

• They are the people who get things done. Effective Engineers produce results.

Adopt the Right Mindsets

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(ns datomic-helpers
  (:require [clojure.java.io :as io]
            [clojure.walk    :as walk]
            [datomic.api     :as d :refer (db)]))

;;; Expose Datomic vars here, for convenience

(def tempid  d/tempid)
(def connect d/connect)
(def create-database d/create-database)

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(ns datomic-helpers
  (:require [datomic.api     :as d]))

;;; Expose Datomic vars here, for convenience

;;; Ring middleware

(defn wrap-datomic
  "A Ring middleware that provides a request-consistent database connection and
  value for the life of a request."

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<?xml version="1.0"?>
<!DOCTYPE module PUBLIC
          "-//Puppy Crawl//DTD Check Configuration 1.3//EN"
	            "http://www.puppycrawl.com/dtds/configuration_1_3.dtd">
                        <module name="Checker">
                            <property name="charset" value="UTF-8" />
                            <property name="severity" value="warning" />
                            <!-- Checks for whitespace -->
                            <!-- See http://checkstyle.sf.net/config_whitespace.html -->
                            <module name="FileTabCharacter">