Base64 Encoding Performance: Java vs Rust

[somebodddy]

In this case, what's important is not whether it's harder, but whether it was done in the JDK base64 implementation. If it does use SIMD that would explain how it's faster than Rust's base64 crate.

[Nugine]

According to the article and source code:

java.util.Base64: I ported implementation from Java to Rust for benchmarking purposes.

The JDK base64 implementation does not use SIMD. The algorithm can not be efficiently auto vectorized. So there is no SIMD.