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Stan Schwertly Stantheman

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Stantheman / wally.go
Created October 19, 2014 04:13
package main
import (
"bufio"
"bytes"
"fmt"
IO "io/ioutil"
"os"
"sort"
"strings"
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Stantheman / perf-test.sh
Last active August 29, 2015 14:09
#!/bin/bash
choose_congestion_control="/proc/sys/net/ipv4/tcp_congestion_control"
ip=127.0.0.1
iperf -s
iperf_pid=$!
for i in $(ls /lib/modules/3.2.0-4-amd64/kernel/net/ipv4/tcp*); do
# transform the path from /lib/.../tcp_bic.ko to bic
@Stantheman
Stantheman / wut.sh
Created November 25, 2014 20:29
➜ pstree for i in {1..32768}; do if [[ -d /proc/$i ]]; then echo /proc/$i; fi done | wc -l
181
➜ pstree find /proc/ -maxdepth 1 -type d -name '[0-9]*' | wc -l
132
@Stantheman
Stantheman / diff-ip.sh
Last active August 29, 2015 14:10
➜ pearls git:(master) ✗ time ~/code/rss2text/rss2text.pl -noc http://feeds.feedburner.com/shopify-technology | ~/code/shortenize/shortenize.pl
http://gaw.sh/akv
http://gaw.sh/akw
http://gaw.sh/akx
http://gaw.sh/aky
http://gaw.sh/akz
http://gaw.sh/al0
http://gaw.sh/al1
http://gaw.sh/al2
http://gaw.sh/al3
@Stantheman
Stantheman / gist:f63c75b18f4f60bbcf22
Created December 10, 2014 02:09
ssh-rsa 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 sschweertly@soggycake
@Stantheman
Stantheman / test.sh
Created January 2, 2015 17:26
test perf between patched and unpatched go encoding/binary
#!/bin/bash
echo "Testing Original"
cp binary_orig.go.old binary.go
for i in {1..5}; do
go test -v -bench='[de]Ints' -run none | grep Read | tee /tmp/tmp.txt
done
echo "Original read ns/op average: $(tr -s ' ' < /tmp/tmp.txt | cut -d' ' -f3 | numaverage)"
echo "Testing Fixed"
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Stantheman / output.txt
Last active August 29, 2015 14:12
use xslt to parse html instead of one liners
# links.html came from:
# http://taint.org/2014/12/27/235802a.html
ubuntu:~/xslt$ xsltproc --html transform.xslt links.html
http://www.newyorker.com/business/currency/airlines-want-you-to-suffer
http://hackaday.com/2014/12/25/writing-a-virtual-machine-in-excel/
@Stantheman
Stantheman / herestring.sh
Created May 15, 2012 14:46
comparing here strings and pipes
#!/bin/bash
for i in {1..1000}; do
sed 's/lo//' <<< "hello world\n"
done
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Stantheman / output
Last active December 14, 2015 21:09
perl substr, verse substition, versus lvalue substring speed comparison using Benchmark. regular substr won by a larger margin than I thought, which makes me generally happy
# running 5.10.0, but according to http://perldoc.perl.org/perl5160delta.html#Performance-Enhancements, these benchmarks might be out of sync:
# Assignment to substr in void context is now more than twice its previous speed. Instead of creating and returning a special lvalue scalar that is then assigned to, substr modifies the original string itself.
# substr no longer calculates a value to return when called in void context.
Benchmark: running l_substr, sed, substring for at least 10 CPU seconds...
l_substr: 11 wallclock secs (10.30 usr + 0.01 sys = 10.31 CPU) @ 1455470.71/s (n=15005903)
sed: 10 wallclock secs (10.35 usr + 0.04 sys = 10.39 CPU) @ 433279.21/s (n=4501771)
substring: 11 wallclock secs (10.44 usr + 0.01 sys = 10.45 CPU) @ 2926646.89/s (n=30583460)
Rate sed l_substr substring
sed 433279/s -- -70% -85%
@Stantheman
Stantheman / output
Created March 14, 2013 02:42
compare perl substitution against "chop if substr($var, -1) eq"
Benchmark: running sed, substr_if for at least 20 CPU seconds...
sed: 21 wallclock secs (21.10 usr + 0.00 sys = 21.10 CPU) @ 1937388.20/s (n=40878891)
substr_if: 21 wallclock secs (21.22 usr + 0.03 sys = 21.25 CPU) @ 2412531.58/s (n=51266296)
Rate sed substr_if
sed 1937388/s -- -20%
substr_if 2412532/s 25% --