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@iamyogish
iamyogish / RTCClient.swift
Created February 19, 2018 09:41
Controlling the bandwidth used by WebRTC during calls
//...
func sendOffer() {
let peerConnection = getPeerConnection()
let mediaConstraints = getMediaConstraints()
peerConnection.offer(for: mediaConstraints) { [weak self] (sdp, error) in
guard error == nil else {

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@jboner
jboner / latency.txt
Last active May 21, 2024 07:18
Latency Numbers Every Programmer Should Know
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