From 8c6fb41933db25597e1af71dcf37befddc5f9ec5 Mon Sep 17 00:00:00 2001
From: Earlopain <earlopain@protonmail.com>
Date: Thu, 21 Apr 2022 20:22:15 +0200
Subject: [PATCH] [Docker] Use jemalloc

It's used in prod, should be done here too then.
Alpine doesn't provide this package, so we'll need to compile it ourself.
Confirmed working with `MALLOC_CONF=stats_print:true ruby -e "exit"`
---
 Dockerfile | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index 3c6853751..42da59db5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,8 +4,13 @@ FROM ruby:2.7.3-alpine
 RUN apk --no-cache add nodejs yarn postgresql-client ffmpeg vips tzdata \
   git build-base postgresql-dev glib-dev
 
-# Nice to have packages
-RUN apk --no-cache add nano sudo bash
+RUN wget -O - https://github.com/jemalloc/jemalloc/releases/download/5.2.1/jemalloc-5.2.1.tar.bz2 | tar -xj && \
+    cd jemalloc-5.2.1 && \
+    ./configure && \
+    make && \
+    make install
+
+ENV LD_PRELOAD=/usr/local/lib/libjemalloc.so.2
 
 # Install js packages and gems
 COPY package.json yarn.lock ./