Akshay Bist elssar

Here are a list of headless browsers that I know about:

[HtmlUnit][1] - Java. Custom browser engine. JavaScript support/DOM emulated. Open source.
[Ghost][2] - Python only. WebKit-based. Full JavaScript support. Open source.
[Twill][3] - Python/command line. Custom browser engine. No JavaScript. Open source.
[PhantomJS][4] - Command line/all platforms. WebKit-based. Full JavaScript support. Open source.
[Awesomium][5] - C++/.Net/all platforms. Chromium-based. Full JavaScript support. Commercial/free.
[SimpleBrowser][6] - .Net 4/C#. Custom browser engine. No JavaScript support. Open source.
[ZombieJS][7] - Node.js. Custom browser engine. JavaScript support/emulated DOM. Open source.
[EnvJS][8] - JavaScript via Java/Rhino. Custom browser engine. JavaScript support/emulated DOM. Open source.

things I don't know

I took this list from What CS majors should know.

I think it is fun to list things I don't know so I did it =D. I actually found it to be a cool exercise -- maybe I should do a fun graphics project and learn about Open GL!

i wrote this because, while i think the things on this list are potentially worth knowing, and I actually think it's an awesome list of project ideas as well as good food for thought for people developing CS curricula (many of the things I don't know are great exercises!) -- I thought it was really weird to say that every CS student should know all of them. I have a CS degree and I learned very few of the things I do know inside my degree.

I classify "do know" as anything that I have a reasonable grasp of or at least some basic experience with -- the kind of experience I'd expect a CS student to be able to get. If I say I don't know something, it means either I know pretty much nothing about it (for "gr

CUSTOM GAME ENGINES: A Small Study

A couple of weeks ago I played (and finished) A Plague Tale, a game by Asobo Studio. I was really captivated by the game, not only by the beautiful graphics but also by the story and the locations in the game. I decided to investigate a bit about the game tech and I was surprised to see it was developed with a custom engine by a relatively small studio. I know there are some companies using custom engines but it's very difficult to find a detailed market study with that kind of information curated and updated. So this article.

Nowadays lots of companies choose engines like Unreal or Unity for their games (or that's what lot of people think) because d

	Latency Comparison Numbers (~2012)
	----------------------------------
	L1 cache reference 0.5 ns
	Branch mispredict 5 ns
	L2 cache reference 7 ns 14x L1 cache
	Mutex lock/unlock 25 ns
	Main memory reference 100 ns 20x L2 cache, 200x L1 cache
	Compress 1K bytes with Zippy 3,000 ns 3 us
	Send 1K bytes over 1 Gbps network 10,000 ns 10 us
	Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD

	start on started mongodb
	stop on stopping mongodb

	# limit the retries to max 15 times with timeouts of 5 seconds
	respawn limit 15 5

	# Time to wait between sending TERM and KILL signals
	kill timeout 20

	script

	var crypto = require('crypto');

	// larger numbers mean better security, less
	var config = {
	// size of the generated hash
	hashBytes: 32,
	// larger salt means hashed passwords are more resistant to rainbow table, but
	// you get diminishing returns pretty fast
	saltBytes: 16,
	// more iterations means an attacker has to take longer to brute force an