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jgaskins / Dockerfile
Created February 12, 2023 13:09
KeyDB with RedisJSON and RediSearch
View Dockerfile
FROM ubuntu:20.04 AS redisjson
RUN apt-get update
RUN apt-get upgrade -y git
RUN apt-get install -y curl gcc
RUN apt-get install -y libclang-dev
RUN curl --proto '=https' --tlsv1.2 -sSf -o && sh ./ -y
RUN git clone --branch v2.4.4
jgaskins /
Last active November 17, 2022 23:25
Running Mastodon on Kubernetes
#!/usr/bin/env bash
# Install nginx ingress controller
# NOTE: This uses DigitalOcean. If you use another Kubernetes provider,
# substitute the appropriate command from here:
kubectl apply -f
export # Make this the DNS name that will point to your LB
export LB_NAME=my-lb # Give this a useful name to identify it on the DigitalOcean control panel
jgaskins /
Created November 1, 2022 21:55
Give DigitalOcean load balancers provisioned for Kubernetes clusters a name and hostname so the Cert Manager HTTP solver will work
#!/usr/bin/env bash
# Fill out these two
export LB_NAME=my-lb
echo '{"metadata":{"annotations":{"":"$LB_HOSTNAME","":"$LB_NAME"}}}' |
envsubst |
awk "{ print \"'\" \$1 \"'\" }" |
xargs kubectl patch svc -n ingress-nginx ingress-nginx-controller -p
jgaskins /
Created May 11, 2022 21:18
Project-local requires in Crystal
# Experiment with macros to allow for project-local requires
{% begin %}
ROOT = "{{system("pwd")}}"
{% end %}
macro spec(file)
macro load_spec
\{% path = __DIR__.gsub(%r{\A{{}}}, "").gsub(%r{[^/]+}, "..").id %}
require "\{{path[1..]}}/spec/{{}}"
jgaskins /
Last active January 30, 2022 19:07
Elasticsearch Example in Crystal
require "http"
require "json"
require "uuid/json"
require "db"
require "interro" # github: jgaskins/interro
require "faker" # github: askn/faker
ES =
pg ="postgres:///")
Interro.config { |c| c.db = pg }
jgaskins /
Last active January 5, 2022 20:08
Array that does not let you mutate while inside an `each` block
class ImmutableEachArray(T)
include Enumerable(T)
@iterating = Atomic(Int32).new(0)
@array = Array(T).new
def <<(value : T) : self
raise"you iteratin bruh") if @iterating.get > 0
@array << value
jgaskins /
Last active May 28, 2021 02:28
Benchmarking Redis drivers: Ruby gem, Hiredis, and a custom Ruby implementation


Name Description
ruby The redis gem with the plain-Ruby driver
hiredis The redis gem with the hiredis driver (compiled as a C extension)
myredis Pure-Ruby, optimized for the specific operation


jgaskins / benchmark.rb
Last active June 25, 2022 14:54
Benchmarking redis gem vs hiredis vs custom Redis client
View benchmark.rb
require 'bundler/inline'
require 'socket'
class MyRedis
CRLF = "\r\n"
def initialize
@connection ='localhost', 6379)
@connection.sync = false
jgaskins /
Created January 18, 2021 05:31
Roda-like routing mixin for Crystal
require "http"
require "./route"
class App
include HTTP::Handler
include Route
def call(context)
route context do |r, response|
jgaskins /
Created December 3, 2020 04:54
Benchmarking allocation time of Crystal objects with various quantities of instance variables
require "benchmark"
value = nil
Benchmark.ips do |x| "1 ivar" { value = } "2 ivars" { value = } "4 ivars" { value = } "8 ivars" { value = } "16 ivars" { value = }