dreness

#!/usr/bin/python

import json
import urllib2
from pprint import pprint

# These URLs are discovered by viewing https://developer.apple.com/wwdc/live/#/
# and using the web inspector to find the wwdc-streaming javascript.
# Currently: https://developer.apple.com/wwdc/live/scripts/app/min/wwdc-streaming-0.1.0.min.js
# Search that javascript for "videos.json" and "videos_live.json"

jboner

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