Tech
This post is a case study of how I profiled a Node.js application, and how using flamegraphs allowed me to make the boot time of Ghost 20% faster. I remember trying to profile Node.js many years ago and it was much harder than it is now. When researching
Tech
I always recommend to my clients that they use a CDN on their website. These are my recommendations for people using the Cloudflare Free plan, along with some warnings to watch out for. DNS * Status: Orange Cloud - this will ensure the requests go through Cloudflare. Crypto * SSL: Full (Strict)
Tech
Earlier today I was looking at a couple of sites to see why they were much slower than I expected. I ran them through GTmetrix and saw the following in the waterfall tab. Straightaway I could see that this is the classic pattern produced by trying to load a bunch
Tech
I recently added support for Ruby 2.5.4, 2.5.5 and 2.6.0-2.6.3 to rbspy, the sampling profiler written in Rust. I have replaced the original Flamegraph library by Brendan Gregg with Inferno, a Rust port. I also updated and merged a PR for handling
Tech
A few days ago, the server running Nomad List [https://nomadlist.com] and Remote OK [https://remoteok.io] randomly went down. This is the timeline of what happened and how I fixed it. All times are in Korean Standard Time. 21:05 Pieter [https://twitter.com/levelsio] starts messaging me
Life
My old laptop was a Lenovo G505s, which I bought in 2014 before starting university. It served me well and got me through a Master's degree & 6 months of work/travelling. However, there were a few things that started to grind on me. The original battery life
Tech
By default, Cloudflare does not cache static HTML. [https://support.cloudflare.com/hc/en-us/articles/200168216--Does-Cloudflare-cache-HTML-content-] It's nice when you're constantly pushing updates because the changes are immediately shown. But it does mean that you still have that short delay whilst Cloudflare gets the latest version
Tech
A week or so ago, I saw the inferno [https://github.com/jonhoo/inferno] project mentioned on the Rust subreddit. It was a rewrite of the great FlameGraph [https://github.com/brendangregg/FlameGraph] library into Rust. All of the work was being livestreamed by Jon Gjengset [https://twitter.com/Jonhoo/
Tech
When a client asks me to take a look at their site, I start off by throwing it into a bunch of services to analyze the performance. One of my favorites is GTmetrix [https://gtmetrix.com] because it has a lot of useful metrics and visualizations. The most useful one
Tech
Towards the end of last year I made Cron Heatmap [https://cronheatmap.com], a website to visualize your cron jobs and help you find hotspots. The motivation from the project comes from my work over at Nomad List [https://nomadlist.com] and Remote OK [https://remoteok.io]. There are over
Business
My work involves clients coming to me looking for a server tune-up. One of the things I can do is to look at the software they're currently running and look at upgrading it to the latest version. A common example here is PHP. I often see people still
Life
I have been considering a pair of Bose QC35 II [https://www.bose.com/en_us/products/headphones/over_ear_headphones/quietcomfort-35-wireless-ii.html] for quite some time and decided to start looking for some when I was in Chiang Mai. I often work from cafés and they can get overwhelmingly