diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index 9c96964..48ab3a3 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -21,7 +21,7 @@ jobs:
         run: make test
 
       - name: Check
-        run: make code-check
+        run: make check
 
       # - name: Benchmark
       #   run: make benchmark
diff --git a/events.go b/events.go
index 034ffd8..ac5d643 100644
--- a/events.go
+++ b/events.go
@@ -8,8 +8,7 @@ import (
 // byteToString convert an array of bytes to a string with no-copy strategy.
 func bytesToString(b []byte) string {
 	// Optimizing space with ordered types.
-	// perf: no allocation/copy to convert to string.
-	// instead take the already existing byte slice to create a string struct.
+	// perf: no allocation/copy to convert to string instead take the already existing byte slice to create a string struct.
 	// WARNING: use this approach with caution and only if we are sure that the bytes slice is not gonna change.
 	return *(*string)(unsafe.Pointer(&b))
 }
diff --git a/id.go b/id.go
index 1c76237..18b107f 100644
--- a/id.go
+++ b/id.go
@@ -1,7 +1,6 @@
 package noise
 
 import (
-	"reflect"
 	"unsafe"
 )
 
@@ -21,14 +20,16 @@ func (i ID) String() string {
 }
 
 // newIDFromString creates a new ID from string.
-// ref: https://stackoverflow.com/questions/59209493/how-to-use-unsafe-get-a-byte-slice-from-a-string-without-memory-copy
 // ref: https://go.dev/ref/spec#Conversions
+// https://pkg.go.dev/unsafe#Pointer
 func newIDFromString(s string) ID {
 	// "no-copy" convert to ID from string.
 	// If the type starts with the operator * or <-, it must be parenthesized when necessary to avoid ambiguity.
-	return *(*ID)(unsafe.Pointer(
-		(*reflect.StringHeader)(unsafe.Pointer(&s)).Data),
-	)
+	// 1- unsafe.Pointer(&s) <- create a pointer from string address
+	// 2- (*ID)(unsafe.Pointer(&s)) <- cast the pointer to *ID pointer
+	// 3 - *(*ID)(unsafe.Pointer(&s)) <- get the value in memory address
+	// TODO could by replaced by unsafe.StringData(s) in go >=1.20
+	return *(*ID)(unsafe.Pointer(&s))
 }
 
 // newBlake2ID creates a new id blake2 hash based.
diff --git a/metrics.go b/metrics.go
index 0d90f88..879251a 100644
--- a/metrics.go
+++ b/metrics.go
@@ -4,16 +4,25 @@ package noise
 // We can add any method related to adaptive lookup logic here.
 // Please see [docs] for more information.
 //
+// !IMPORTANT The order of byte size needed for each type in structs matter and impact the struct size.
+// The fields are distributed in a way that ensures their alignment in 8-byte blocks.
+// For instance on a 64-bit CPU, alignment blocks are 8 bytes.
+//
+//	0: [latency, bandwidth, nonce, sent], // 8 bytes
+//	1: [recv, handshakeTime, 2bytespadding], // 8 bytes
+//	2: [bytesRecv], // 8 bytes
+//	3: [bytesSent], // 8 bytes
+//
 // [docs]: https://arxiv.org/pdf/1509.04417.pdf
 type metrics struct {
-	bytesRecv     uint64 // bytes received
-	bytesSent     uint64 // bytes sent
-	handshakeTime uint32 // how long took the handshake to complete.
-	latency       uint16 // rtt in ms
-	bandwidth     uint16 // remote peer bandwidth
-	nonce         uint16 // nonce ordering factor
-	sent          uint16 // counter sent messages
-	recv          uint16 // counter received messages
+	latency       uint16 // rtt in ms: 2bytes
+	bandwidth     uint16 // remote peer bandwidth: 2bytes
+	nonce         uint16 // nonce ordering factor: 2bytes
+	sent          uint16 // counter sent messages: 2bytes
+	recv          uint16 // counter received messages: 2bytes
+	handshakeTime uint32 // how long took the handshake to complete.: 4bytes
+	bytesRecv     uint64 // bytes received: 8bytes
+	bytesSent     uint64 // bytes sent: 8 bytes
 }
 
 // TODO https://community.f5.com/t5/technical-articles/introducing-tcp-analytics/ta-p/290873