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Adrien Rey-Jarthon jarthod

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@jarthod
jarthod / browser-mockup.png
Last active October 31, 2022 09:23
Pure CSS browser mockups
browser-mockup.png
@jarthod
jarthod / ffmpeg_cheat_sheet.md
Last active December 28, 2023 16:36
ffmpeg cheat sheet

base encode to H265 (HEVC)

ffmpeg -i in.mts -c:a copy -c:v libx265 out.mp4

base encode to H264

ffmpeg -i in.mts -c:a copy -c:v h264 out.mp4

base encode to AV1 (lower cpu-used = slower)

@jarthod
jarthod / git_cleanup.rb
Last active August 29, 2015 14:13
Ruby script to cleanup large files from your git repository
#!/usr/bin/env ruby
# Ruby shows you the largest objects in your git repo's pack file & offers you to remove them automatically
# Based on http://stubbisms.wordpress.com/2009/07/10/git-script-to-show-largest-pack-objects-and-trim-your-waist-line/ by Antony Stubbs
# Use this to fetch all branches locally first:
# for branch in `git branch -a | grep remotes | grep -v HEAD | grep -v master`; do
# git branch --track ${branch##*/} $branch
# done
@jarthod
jarthod / deploy.rb
Created September 20, 2015 08:20
Capistrano local assets compile
# Rewrite precompile tasks to do it locally
Rake::Task["deploy:compile_assets"].clear
task :compile_assets => [:set_rails_env] do
# invoke 'deploy:assets:precompile'
invoke 'deploy:assets:precompile_local'
invoke 'deploy:assets:backup_manifest'
end
namespace :assets do
task :precompile_local do
@jarthod
jarthod / application_helper.rb
Last active February 14, 2016 15:21
Rails helper to render time using client's browser locale
# Use this in place of `time_tag`
# Ex: <%= local_time_tag user.created_at %>
def local_time_tag time, opts = {}
opts[:data] = (opts[:data] || {}).merge format: 'local'
opts[:title] ||= time
time_tag(time, opts) + content_tag(:script, raw(<<-JAVASCRIPT))
var nodes = document.querySelectorAll('time[data-format=local]');
if (nodes.length > 0) {
var elem = nodes[nodes.length - 1];
@jarthod
jarthod / server_benchmark.md
Last active January 6, 2024 10:05
Server benchmark

Results

Server Price* CPU (1 thread) CPU (4 threads) IO
Scaleway Start1-XS
Atom C3955, 25G NVMe		 $4 21 sec
P₉₅ = 2.1ms		 21 sec
P₉₅ = 14ms		 🚗 653 IO/s, 10 Mb/sec
P₉₅ = 0.40ms
Scaleway VC1-S
Atom C2750, 50G SSD		 $4 46 sec ⚠️
P₉₅ = 4.6ms		 23 sec
P₉₅ = 14ms		 🚲 289 IO/s, 4.5 Mb/sec
P₉₅ = 0.39ms
Hetzner CPX11
AMD EPYC, 40G SSD		 $5 20 sec
P₉₅ = 3.2ms		 9.6 sec
P₉₅ = 11ms		 ✈️ 3656 IO/s, 57 Mb/sec
P₉₅ = 0.29ms
Hetzner CX21
Intel Xeon, 40G SSD		 $6 24 sec
P₉₅ = 2.8ms		 12.5 sec
P₉₅ = 11ms		 🚤 1946 IO/s, 30 Mb/sec
P₉₅ = 0.97ms
AWS t2.micro 1G*Intel E5-2676 v3 2.4
@jarthod
jarthod / set_nf_conntrack_max.sh
Last active October 25, 2020 09:58
Fix synology DS414 nf_conntrack: table full issue
sudo cat /proc/sys/net/netfilter/nf_conntrack_max
echo 500000 | sudo tee /proc/sys/net/netfilter/nf_conntrack_max
sudo cat /proc/sys/net/netfilter/nf_conntrack_max
@jarthod
jarthod / compressed_hash.rb
Last active August 16, 2022 13:39 — forked from romanbsd/compressed.rb
Compressed fields in Mongoid 6.4+
require 'zstd-ruby'
class CompressedHash < Hash
DICTIONARY = IO.read('config/dictionaries/1')
def mongoize
if size > 0 # only compress non-empty hash
# BSON::Binary.new(Zstd.compress(self.to_bson.to_s))
BSON::Binary.new(Zstd.compress_using_dict(self.to_bson.to_s, DICTIONARY))
else
self
@jarthod
jarthod / process_semaphore.rb
Created April 17, 2019 08:31
Provides a system wide file lock to ensure no more than X process is running at the same time.
#!/usr/bin/env ruby
# Provides a system wide file lock to ensure no more
# than X process is running at the same time.
# Example:
#
# process_semaphore!({
# prefix: "/tmp/my_process",
# limit: 2
@jarthod
jarthod / mongo-hang-monitoring.rb
Created November 8, 2019 08:31
Ruby script which tries to detect when mongo is up but super slow (for example due to IO issue) and stop it to allow fallback to secondary
#!/usr/bin/env ruby
# Tries to detect when mongo is up but super slow (ex: IO issue)
THRESHOLD = 20_000 # ms
def test_mongo tries: 5
out = `echo -e "db.isMaster()\ndb.getReplicationInfo()" | mongo mongodb://localhost/?socketTimeoutMS=#{THRESHOLD} 2>&1`
res = $?
if res != 0 && !out['Connection refused']