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kamilhism / latency.txt
Created November 29, 2015 13:03 — forked from jboner/latency.txt
Latency Numbers Every Programmer Should Know
Latency Comparison Numbers
--------------------------
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
Send 1K bytes over 1 Gbps network 10,000 ns 0.01 ms
Read 4K randomly from SSD* 150,000 ns 0.15 ms
@kamilhism
kamilhism / snow.sh
Created December 12, 2015 19:53
Snowflakes inside your terminal.
#!/bin/bash
LINES=$(tput lines)
COLUMNS=$(tput cols)
declare -A snowflakes
declare -A lastflakes
clear
@kamilhism
kamilhism / oktaverify2totp.md
Created September 10, 2022 16:18
Get TOTP secret key for Okta Verify
  1. Get the content of the QR for Okta Verify app setup. It looks like this: oktaverify://[email protected]/?t=XXXXX&f=YYYYY&s=https://DOMAIN.okta.com&issuer=DOMAIN.okta.com&isIdxEnabled=true
  2. Replace XXXXX, YYYYY and DOMAIN to your values in curl below:
curl --request POST \
  --url https://DOMAIN.okta.com/idp/authenticators \
  --header 'Accept: application/json; charset=UTF-8' \
  --header 'Accept-Encoding: gzip, deflate' \
  --header 'Authorization: OTDT XXXXX' \
  --header 'Content-Type: application/json; charset=UTF-8' \