documentation improvements to internal/slices.go and README

README.md

@@ -21,7 +21,7 @@ Userspace networking primitives.
     - Can produce **very** small binaries. Ideal for embedded systems.
 - Extremely simple networking stack construction. Can be used to teach basics of networking
     - Only one networking interface fulfilled by all implementations. See [abstractions](#abstractions).
-- Stack can be fuzz tested very fast: 
+- Stack can be fuzz tested efficiently, see benchmarks below: 
     - `go test ./x/xnet/ -run FuzzStackAsyncHTTP -fuzz=.` fuzzes Ethernet/IP/TCP/HTTP stack with 170k HTTP exchanges per second on 12 core machine: `fuzz: elapsed: 4m9s, execs: 42649941 (169428/sec), new interesting: 5 (total: 52)`
 
 ## [`min-working-example`](./examples/min-working-example/) - Quick lneto showcase

internal/slices.go

@@ -2,6 +2,18 @@ package internal
 
 import "unsafe"
 
+// BytesEqual is heapless replacement of [bytes.Equal] since it allocates in tinygo.
+// https://github.com/tinygo-org/tinygo/issues/4045
+func BytesEqual(a, b []byte) bool {
+	if len(a) != len(b) {
+		return false
+	}
+	if len(a) == 0 {
+		return true
+	}
+	return unsafe.String(&a[0], len(a)) == unsafe.String(&b[0], len(b))
+}
+
 // IsZeroed returns true if all arguments are set to their zero value.
 func IsZeroed[T comparable](a ...T) bool {
 	var z T
@@ -68,18 +80,15 @@ func SliceReclaim[T any](ptr *[]T) *T {
 	return &(*ptr)[n]
 }
 
-// BytesEqual is heapless replacement of [bytes.Equal] since it allocates in tinygo.
+// SliceDequeueFront removes and returns the first element of the slice.
-// https://github.com/tinygo-org/tinygo/issues/4045
+// It shifts all remaining elements left by one index and truncates the slice.
-func BytesEqual(a, b []byte) bool {
+// The underlying array capacity remains unchanged; the last element's slot
-	if len(a) != len(b) {
+// is not zeroed before truncation.
-		return false
+//
-	}
+// Complexity: O(n) where n is the length of the slice, due to the element shift.
-	if len(a) == 0 {
+//
-		return true
+// Warning: Calling this function on an empty slice will panic (index out of range).
-	}
+// The caller must ensure len(*a) > 0 before calling.
-	return unsafe.String(&a[0], len(a)) == unsafe.String(&b[0], len(b))
-}
-
 func SliceDequeueFront[T any](a *[]T) T {
 	s := *a
 	v := s[0]