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@jboner
jboner / latency.txt
Last active November 18, 2024 08:23
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
@zziuni
zziuni / stuns
Created September 18, 2012 08:05
STUN server list
# source : http://code.google.com/p/natvpn/source/browse/trunk/stun_server_list
# A list of available STUN server.
stun.l.google.com:19302
stun1.l.google.com:19302
stun2.l.google.com:19302
stun3.l.google.com:19302
stun4.l.google.com:19302
stun01.sipphone.com
stun.ekiga.net
@brycelelbach
brycelelbach / zero_copy_archives.cpp
Created October 14, 2012 15:07
Zero Copy with Boost.Asio/Boost.Serialization
// Copyright (c) 2012 Bryce Adelstein-Lelbach
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
// hpx::util::container_device can be found here:
// http://raw.github.com/STEllAR-GROUP/hpx/master/hpx/util/container_device.hpp
// The portable binary archives used can be found here:
// http://raw.github.com/STEllAR-GROUP/hpx/master/hpx/util/portable_binary_oarchive.hpp
@staltz
staltz / introrx.md
Last active November 17, 2024 01:08
The introduction to Reactive Programming you've been missing
@myusuf3
myusuf3 / delete_git_submodule.md
Created November 3, 2014 17:36
How effectively delete a git submodule.

To remove a submodule you need to:

  • Delete the relevant section from the .gitmodules file.
  • Stage the .gitmodules changes git add .gitmodules
  • Delete the relevant section from .git/config.
  • Run git rm --cached path_to_submodule (no trailing slash).
  • Run rm -rf .git/modules/path_to_submodule (no trailing slash).
  • Commit git commit -m "Removed submodule "
  • Delete the now untracked submodule files rm -rf path_to_submodule
@enh
enh / build-boost-for-android.sh
Last active July 19, 2023 00:19
Shell script to build boost for Android
#!/bin/bash
version=1.68.0
echo "Building boost $version..."
set -eu
toolchain=$PWD/toolchain
if [ ! -d "$toolchain" ]; then
echo "Building toolchain..."
@reline
reline / CustomTrust.java
Last active August 24, 2022 12:45
Trusting self-signed certificates in Android using OkHttp
import okhttp3.*;
import okio.Buffer;
import javax.net.ssl.*;
import java.io.IOException;
import java.io.InputStream;
import java.security.GeneralSecurityException;
import java.security.KeyStore;
import java.security.cert.Certificate;
import java.security.cert.CertificateFactory;