perf: Improve @foxify/fresh stale check performance

Author: ardalanamini

.changeset/long-hairs-train.md

@@ -0,0 +1,5 @@
+---
+"@foxify/fresh": patch
+---
+
+Improve stale check performance

benchmarks/fresh/README.md

@@ -6,30 +6,30 @@
 ℹ Benchmark: etag-several
   2 tests completed.
 
-  @foxify/fresh x 47,660,237 ops/sec ±0.18% (99 runs sampled)
-  fresh         x  6,465,652 ops/sec ±0.80% (96 runs sampled)
+  @foxify/fresh x 46,643,956 ops/sec ±0.08% (99 runs sampled)
+  fresh         x  6,464,804 ops/sec ±0.15% (99 runs sampled)
 
 ℹ Benchmark: etag-single
   2 tests completed.
 
-  @foxify/fresh x 60,990,697 ops/sec ±0.50% (100 runs sampled)
-  fresh         x 28,459,834 ops/sec ±0.33% (99 runs sampled)
+  @foxify/fresh x 59,921,046 ops/sec ±0.22% (97 runs sampled)
+  fresh         x 26,579,845 ops/sec ±1.25% (95 runs sampled)
 
 ℹ Benchmark: etag-star
   2 tests completed.
 
-  @foxify/fresh x 154,660,013 ops/sec ±0.11% (99 runs sampled)
-  fresh         x 155,164,859 ops/sec ±0.11% (99 runs sampled)
+  @foxify/fresh x 149,770,865 ops/sec ±0.24% (100 runs sampled)
+  fresh         x 149,440,474 ops/sec ±0.30% (98 runs sampled)
 
 ℹ Benchmark: modified
   2 tests completed.
 
-  @foxify/fresh x 3,178,965 ops/sec ±0.19% (98 runs sampled)
-  fresh         x 3,103,903 ops/sec ±0.19% (99 runs sampled)
+  @foxify/fresh x 3,101,171 ops/sec ±0.08% (97 runs sampled)
+  fresh         x 3,029,379 ops/sec ±0.14% (99 runs sampled)
 
 ℹ Benchmark: not-modified
   2 tests completed.
 
-  @foxify/fresh x 3,187,981 ops/sec ±0.24% (98 runs sampled)
-  fresh         x 3,150,836 ops/sec ±0.22% (94 runs sampled)
+  @foxify/fresh x 3,125,705 ops/sec ±0.10% (100 runs sampled)
+  fresh         x 3,058,272 ops/sec ±0.09% (99 runs sampled)
 ```

packages/fresh/src/index.ts

@@ -1,4 +1,4 @@
-import { IncomingHttpHeaders, OutgoingHttpHeaders } from "http";
+import { IncomingHttpHeaders, OutgoingHttpHeaders } from "node:http";
 
 /**
  * RegExp to check for no-cache token in Cache-Control.
@@ -46,9 +46,7 @@ function isStale(etag: string, noneMatch: string): boolean {
     }
   }
 
-  if (compareETags(etag, noneMatch.substring(start, end))) return false;
-
-  return true;
+  return !compareETags(etag, noneMatch.substring(start, end));
 }
 
 /**