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@jsocol
jsocol / data-uri.py
Created July 18, 2011 14:48
Give an image, get a data-uri
#!/usr/bin/env python
"""Command line script to convert a file, usually an image, into a data URI
for use on the web."""
import base64
import mimetypes
import os
import sys
@jboner
jboner / latency.txt
Last active November 19, 2024 14:58
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
@nibrahim
nibrahim / ep
Created October 18, 2016 11:27
Pipe output of commands into Emacs
#!/usr/bin/env python
import sys
import subprocess
PIPE_BUFFER_NAME="*piped*"
def execute_command(c):
cmd = ["/usr/bin/emacsclient", "-n", "-e", c]
p = subprocess.Popen(cmd, stdout=subprocess.DEVNULL)