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Replies

Maxim Sakhno @maxim-sakhno.bsky.social · 28/01/2026

Is #LiteStar faster than #FastAPI? Benchmarks say yes, but look at Dependency Injection. 📉 Adding just 2 flat dependencies significantly degrades the throughput. I dug into the source to find why. Thread: TaskGroups, Kahn's algorithm & performance trade-offs. 🧵 #Python #Backend #WebDev

A bar chart titled "LiteStar" showing Request Per Second (RPS) performance across different numbers of dependencies (0 to 5). The RPS drops from 41,451 with 1 dependency to 26,492 with 2 dependencies. A red arrow points to this 36% decrease with a handwritten caption asking "Why?".

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Maxim Sakhno @maxim-sakhno.bsky.social · 28/01/2026

The scenario: simple flat dependencies. No nesting, just direct injection. Below is the LiteStar setup and the dependency graph it builds behind the scenes. 👇

On the left, LiteStar code defines two simple async dependencies and two handlers: 'handler1' using one dependency and 'handler2' using two. On the right, a hand-drawn schematic visualizes the mapping: 'handler1' connects to 'dep0', while 'handler2' connects to both 'dep0' and 'dep1'.

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Oliver Novak @karpizashana.bsky.social · 28/01/2026

The memes are funny, the situation is scary 🤭

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Maria Sosnovskaya @sosnovskaya.bsky.social · 28/01/2026

Thank you for the research, it's very interesting :) Now I will know about this behavior of LiteStar!

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