for better reading experience (code formatting), read on the original blog, link on bottom section of this post. Normally we use LXC/LXD, KVM, QEMU, Docker, Vagrant, VirtualBox, VMWare or any other virtualization and containerization software to spawn a VM-like instance locally. Today we’re gonna try multipass, a tool to spawn…

Today we will benchmark a single node version of distributed database (and some non-distributed database for comparison), the client all written with Go (with any available driver). The judgement will be about performance (that mostly write, and some infrequent read), not about the distribution performance (I will take a look…

These benchmark results taken from electhomas’ repo, have a quite interesting result (new serialization formats). Let’s see how much serialization cost, the fastest: As we can see, Mum, Gencode, Colfer, Bebop, Gotiny, XDR2, MsgPack wins in terms of performace, in cost of serialization size. Let’s check the deserialization performace, the…

GoPS is one alternative (also made by Google, other than pprof) to measure, trace or diagnose the performance and memory usage your Go-powered service/long-lived program. The usage is very easy, you just need to import and add 3 lines in your main (so the gops command line can communicate with…

Recently I stumbled upon slow library/function problem and don’t know chich part that causes it, and found out that there’s a easy way to trace either Go, Ruby, or Python code using Pyroscope. The feature is a bit minimalist, there’s no memory usage tracing yet unlike in gops or pprof…

Motivation of this article is to promote less painful way of testing, structuring codes, and less broken test when changing logic/implementation details (only changing the logic not changing the input/output). This post recapping past ~4 years compilation of articles that conclude that Fake > Mock, Classical Test > Mock Test…

As you already know, after doing a lot of maintenance work of other people’s code, I don’t like to follow blindly so called “best practice” or popular practice that are proven painful in the long run when it’s followed blindly/doesn’t fit project’s use case, eg. using dynamically-typed language (JS, Python…