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jboner / latency.txt
Last active June 8, 2023 20:34
Latency Numbers Every Programmer Should Know
View latency.txt
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
willurd /
Last active June 8, 2023 13:14
Big list of http static server one-liners

Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000
cowboy /
Last active June 8, 2023 02:22
jQuery Tiny Pub/Sub: A really, really, REALLY tiny pub/sub implementation for jQuery.
markbates / gist:4240848
Created December 8, 2012 16:06
Getting Started with Rack
View gist:4240848

If you're writing web applications with Ruby there comes a time when you might need something a lot simpler, or even faster, than Ruby on Rails or the Sinatra micro-framework. Enter Rack.

Rack describes itself as follows:

Rack provides a minimal interface between webservers supporting Ruby and Ruby frameworks.

Before Rack came along Ruby web frameworks all implemented their own interfaces, which made it incredibly difficult to write web servers for them, or to share code between two different frameworks. Now almost all Ruby web frameworks implement Rack, including Rails and Sinatra, meaning that these applications can now behave in a similar fashion to one another.

At it's core Rack provides a great set of tools to allow you to build the most simple web application or interface you can. Rack applications can be written in a single line of code. But we're getting ahead of ourselves a bit.

voluntas / webrtc.rst
Last active May 25, 2023 16:31
WebRTC コトハジメ
View webrtc.rst
imjasonh / markdown.css
Last active May 15, 2023 11:13
Render Markdown as unrendered Markdown (see
View markdown.css
* {
font-size: 12pt;
font-family: monospace;
font-weight: normal;
font-style: normal;
text-decoration: none;
color: black;
cursor: default;


Frontend Study 用

前提: フロントエンドは式年遷宮が有効である

  • DB を持たないため、表層の技術を交換するだけで済む
    • JSON API が実質的な分解点になっている
    • 近年ではモバイルアプリのために JSON API が切り離されていることが多く、ここの利用者になるだけでよい
  • Rails や PHP で ORM ヘルパーにべったりな場合に困難になる(クライアントで同等のバリデーションを再現する必要)
listochkin / node-command-line-options.txt
Created April 17, 2014 11:00
Node V8 GC-related options
View node-command-line-options.txt
--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
mattetti / multipart_upload.go
Last active May 11, 2023 08:52
Example of doing a multipart upload in Go (golang)
View multipart_upload.go
package main
import (