Karol Bąk
@kukicola.io
CTO @ Measure Studio
Writing about Ruby, Rails and other web technologies in my spare time - http://kukicola.io
Side project: http://shinygems.dev
Writing about Ruby, Rails and other web technologies in my spare time - http://kukicola.io
Side project: http://shinygems.dev
With AI, you can code in any language without knowing its syntax. The "performance vs development speed" trade-off is fading - you can prototype in Go as fast as in Ruby. What happens to developer-friendly languages when every language becomes easy to write?
January 8, 2026 at 3:41 PM
With AI, you can code in any language without knowing its syntax. The "performance vs development speed" trade-off is fading - you can prototype in Go as fast as in Ruby. What happens to developer-friendly languages when every language becomes easy to write?
I asked Opus to write a simple MCP server that would allow to fetch RDS/OpenSearch instance info and their metrics from Cloudwatch. Then, I asked for deep analysis of my existing AWS resources using this MCP. Saved few hundred $/m due to overprovisioned instances. Exiting times!
January 3, 2026 at 4:25 PM
I asked Opus to write a simple MCP server that would allow to fetch RDS/OpenSearch instance info and their metrics from Cloudwatch. Then, I asked for deep analysis of my existing AWS resources using this MCP. Saved few hundred $/m due to overprovisioned instances. Exiting times!
I just published a new gem - a high-performance ClickHouse client that uses Native data format and persisted connections (should be faster than all other implementations). Not production tested yet, but if you work with ClickHouse in Ruby, give it a try
github.com/kukicola/cli...
github.com/kukicola/cli...
GitHub - kukicola/clickhouse-rb: Ruby client for ClickHouse with Native format support
Ruby client for ClickHouse with Native format support - kukicola/clickhouse-rb
github.com
December 28, 2025 at 9:47 PM
I just published a new gem - a high-performance ClickHouse client that uses Native data format and persisted connections (should be faster than all other implementations). Not production tested yet, but if you work with ClickHouse in Ruby, give it a try
github.com/kukicola/cli...
github.com/kukicola/cli...
One simple line, 30% reduction in test suite execution time :s
January 16, 2025 at 7:38 PM
One simple line, 30% reduction in test suite execution time :s
First blog post of the year! This time it's not ruby related
kukicola.io/posts/reduci...
kukicola.io/posts/reduci...
AWS NAT Gateway cost is killing you? Enable IPv6 and Egress-only Internet Gateway! - kukicola.io
Sometimes I feel that AWS is the master of unexpected costs. If you are looking for a quick way to reduce the cost of NAT Gateway, enabling IPv6 and Egress-only Internet Gateway is an easy way to do i...
kukicola.io
January 9, 2025 at 8:11 PM
First blog post of the year! This time it's not ruby related
kukicola.io/posts/reduci...
kukicola.io/posts/reduci...
I didn't write a single blog post in 2024, so it shouldn't be hard to beat that result in 2025.
January 4, 2025 at 2:20 PM
I didn't write a single blog post in 2024, so it shouldn't be hard to beat that result in 2025.
Anyone using sidekiq with dragonflydb?
December 30, 2024 at 5:15 PM
Anyone using sidekiq with dragonflydb?
Finally had some time to update shinygems.dev to #hanami 2.2. Went smoothly, although I kept my manual ROM setup.
ShinyGems - Help maintain your favourite gems and make them shine
Help maintain your favorite gems and make them shine ✨
shinygems.dev
November 16, 2024 at 1:45 PM
Finally had some time to update shinygems.dev to #hanami 2.2. Went smoothly, although I kept my manual ROM setup.