feat: increase RandomCache size from 256 to 4096 bytes (#51)

larseggert · web-flow · commit 598c0946dfef · 2026-05-11T08:16:28.000-04:00
`random::&lt;N&gt;()` refills a thread-local cache via `PK11_GenerateRandom`
(SHA-256 DRBG) each time the cache is exhausted. That can still
cause measurable overheads if a lot of random bytes are needed.
diff --git a/src/p11.rs b/src/p11.rs
@@ -363,7 +363,7 @@ struct RandomCache {
 }
 
 impl RandomCache {
-    const SIZE: usize = 256;
+    const SIZE: usize = 4096;
     const CUTOFF: usize = 32;
 
     // Const constructor for compile-time initialization in thread_local!.

Original file line number	Diff line number	Diff line change
`@@ -363,7 +363,7 @@ struct RandomCache {`
`363`	`363`	`}`
`364`	`364`
`365`	`365`	`impl RandomCache {`
`366`		`- const SIZE: usize = 256;`
	`366`	`+ const SIZE: usize = 4096;`
`367`	`367`	`const CUTOFF: usize = 32;`
`368`	`368`
`369`	`369`	`// Const constructor for compile-time initialization in thread_local!.`