How I Reduced Website Latency by Optimizing the Right Things

I recently spent some time optimizing one of my websites, and honestly, the biggest improvements didn’t come from some fancy optimization trick.

It came from measuring everything first.

I started looking at the actual request timings:

• DNS lookup
• TCP connection
• TLS handshake
• Time to First Byte (TTFB)
• Total response time

Then I worked through the bottlenecks one by one.

Some of the things that helped:

• Reduced unnecessary server-side work
• Improved caching
• Optimized API requests
• Kept database queries lean
• Reduced unnecessary network round trips
• Tuned the VPS/server configuration
• Used CDN/edge caching where it actually made sense
• Removed things from the critical path that didn't need to be there

One thing I learned: a website can feel “fast” locally while being noticeably slower for someone sitting thousands of kilometers away.

So I started testing from different locations instead of relying only on my own browser.

The goal wasn't to chase a perfect Lighthouse score.

It was much simpler:

Make the first request reach the user as quickly as possible.

And the interesting part is that small improvements across several layers added up to a pretty significant difference.

Still experimenting with it, but this was a good reminder that performance optimization is mostly about finding the actual bottleneck instead of guessing.

What’s the biggest latency bottleneck you've found in one of your projects?