Cutting a Cold cargo check From 23.77s to 0.47s on an M4
A cold cargo check of rust-analyzer goes from 23.77s to 0.47s. Three changes across cargo and rustc, what each one bought, and how two of them ship as a separate tool that …
Tag archive
#Rust
Notes connected by the Rust tag.
13
entries
→
Taking the 2B Qwen3-TTS from 0.876 RTF to 0.253 RTF on Apple Silicon M4
A day of profiling a two-billion-parameter speech model on an M4 MacBook Pro, told as six wrong predictions. The largest win was nine lines of sorting, and one of my two …
Tuning CosyVoice3 in Rust: Where the Speed Actually Was
The same speech model made fast a second time, in Rust on Metal, from RTF 2.96 to 0.697. Scheduling beat kernels, and two of the measurements I steered by were wrong.
Narrating Book-Length Text on One Machine
A pipeline for turning a book-length document into narrated audio with word-level timings on one machine: three engines behind one trait, the text rules that decide quality, …
From Noisy Kenyan ID OCR to JSON with MLX and Candle
Fine-tune a 50M-parameter model on synthetic Kenyan ID OCR, measure field-level accuracy, and package the fused F16 weights for Candle inference in Rust.
From PP-OCRv6 Text to Kenyan ID JSON
A measured walkthrough of the modes, schema, synthetic fixture, and small understanding model I put around PP-OCRv6 to extract Kenyan ID fields locally.
Building Dream TTS Around Durable Local Speech Jobs
How Dream TTS separates its Flutter interface from Rust synthesis work so document imports, resumable jobs, model files, and private audio stay manageable.
Moving AuthOS Rust Builds Out of Docker with cargo-zigbuild
How we cross-compiled three AuthOS binaries with cargo-zigbuild, kept Docker for packaging, and cut our warm publish builds from about 15 minutes per variant to 90 seconds.
What Actually Limited AuthOS on SQLite
AuthOS appeared to hit SQLite's limits at 130 requests per second. Moving Argon2 work, audit writes, activity updates, and overload control changed the result—and exposed what …
Serializing SQLite Writes in a Parallel Rust Test Suite
How a Rust SSO test suite exposed SQLite write contention, why timeouts and raw transaction SQL did not solve it, and how one writer connection stabilized eight parallel …
Serializing SAML Certificate Rotation with a PostgreSQL Row Lock
A concurrent integration test exposed a check-then-act race in a Rust SAML key-rotation handler. A transaction, a lock on the shared service row, and a partial unique index …
From a Rust Benchmark to an SSO Platform for 500,000 MAU
How AuthOS grew around a small Rust core, and what its measured budget-VM throughput means under an explicit 500,000-MAU traffic model.
