jhclark
/ configure_powershell.ps1
Last active Nov 9, 2017
Quick configure powershell (PSReadline + other goodies)
View configure_powershell.ps1
| # Install | |
| (new-object Net.WebClient).DownloadString("http://psget.net/GetPsGet.ps1") | iex | |
| install-module psreadline | |
| # One time use | |
| import-module psreadline | |
| Set-PSReadlineOption -EditMode Emacs | |
| # Configure for use on every login | |
| # First, make sure we're not going to clobber an existing profile... |
jhclark
/ gist:3077255
Created Jul 9, 2012
— forked from palexander/gist:2975305
Connecting to a remote mosh server where mosh was installed in ~/prefix
View gist:3077255
| mosh --server="LD_LIBRARY_PATH=~/prefix/lib ~/prefix/bin/mosh-server" server.com |
jhclark
/ latency.txt
Created May 31, 2012
— forked from jboner/latency.txt
Latency numbers every programmer should know
View latency.txt
| 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 1 MB sequentially from memory 250,000 ns 0.25 ms | |
| Round trip within same datacenter 500,000 ns 0.5 ms | |
| Read 1 MB sequentially from SSD 1,000,000 ns 1 ms 4X memory |
View dumb.cc
| // building: | |
| // g++ -I$HOME/prefix/include/ -Iklm -c dumb.cc | |
| // g++ -lz klm/util/file.o klm/util/mmap.o klm/util/exception.o dumb.o -o dumb | |
| #include <stdint.h> | |
| #include <iostream> | |
| using namespace std; | |
| #include <boost/functional/hash.hpp> |