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@malkia
malkia / fileinfo.c
Created August 15, 2011 22:41
Low level directory reading on Windows
#include <windows.h>
#include <stdio.h>
// to compile:
// cl fileinfo.c setargv.obj
void fileinfo(const char*name);
int main( int argc, const char* argv[] )
{
int i;
@jboner
jboner / latency.txt
Last active November 15, 2024 14:00
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
@dmarx
dmarx / LinkFixerClone.py
Last active January 19, 2021 02:20
A simple LinkFixerBot clone developed as a demonstration for anyone who is curious how a simple reddit bot might be coded. To kill this code, spam "Ctrl+C" until it catches the exception.
import praw # simple interface to the reddit API, also handles rate limiting of requests
import re
from collections import deque
from time import sleep
USERNAME = "Your username here"
PASSWORD = "Your password here"
USERAGENT = "Your useragent string here. It should include your /u/username as a courtesy to reddit"
r = praw.Reddit(USERAGENT)