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jacopofar / jwt_keypair_expiration.py
Created July 25, 2018 15:32
Python 3 JWT example with keypair
import datetime
import time
# not used, but required by pyjwt, import to ensure it exists
import cryptography
import jwt
key = 'secret'
encoded = jwt.encode({'some': 'payload'}, key, algorithm='HS256')
print('encoded', encoded)
@jboner
jboner / latency.txt
Last active July 26, 2024 04:31
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