Compared Gemini 3.8 Flash and Gemma 4

A developer's side-by-side test found that Google's Gemini 3.8 Flash cloud model produced a faster Rust parsing function than the local Gemma 4 model (gemma-4-26B_q4_0-it.gguf), cutting starts_with calls from 4 per byte to 1 by adding a quoted-string fast path and a match statement. Both generated functions worked correctly, and the developer pasted the Gemini version into their program after paying $0.01 for the output.

Today I wanted to test Gemini 3.8 Flash a cloud model from Google . I decided to compare its output to a local Gemma 4 model specifically gemma-4-26B q4 0-it.gguf . I wanted to generate a somewhat complex, performance-tuned Rust parsing function . First I tested Gemma 4 . It used a while -loop over the string's bytes, and a state machine. It called starts with several times. The function appears to work correctly, although it would use starts with 4 times over every byte. Next, I used Gemini 3.8 Flash on OpenRouter. It generated the same basic function, but with 2 additional optimizations. It uses a "fast path" through quoted strings, and then a match before calling starts with . So it uses starts with 1 time for every byte. Both functions will work correctly ; Gemini 3.8 Flash used a fast path, and reduced the number of starts with calls from 4 to 1 on each byte. So Gemini 3.8 Flash, for the cost of $0.01, gave me faster code . The speed difference may be small, but I pasted the Gemini function into my program.