perf: struct memory alignment

cmd/pigo/main.go

@@ -35,9 +35,6 @@ Go (Golang) Face detection library.
 
 `
 
-// messageType is a placeholder for various message types.
-type messageType int
-
 // pipeName is the file name that indicates stdin/stdout is being used.
 const pipeName = "-"
 
@@ -69,22 +66,22 @@ var (
 )
 
 var (
-	eyeCascades   = []string{"lp46", "lp44", "lp42", "lp38", "lp312"}
+	eyeCascades   = [5]string{"lp46", "lp44", "lp42", "lp38", "lp312"}
-	mouthCascades = []string{"lp93", "lp84", "lp82", "lp81"}
+	mouthCascades = [4]string{"lp93", "lp84", "lp82", "lp81"}
 )
 
 // faceDetector struct contains Pigo face detector general settings.
 type faceDetector struct {
-	angle        float64
 	cascadeFile  string
 	destination  string
+	puploc       string
+	flploc       string
+	angle        float64
 	minSize      int
 	maxSize      int
 	shiftFactor  float64
 	scaleFactor  float64
 	iouThreshold float64
-	puploc       string
-	flploc       string
 	markDetEyes  bool
 }
 
@@ -97,9 +94,9 @@ type coord struct {
 
 // detection holds the detection points of the various detection types
 type detection struct {
-	FacePoints     coord   `json:"face,omitempty"`
 	EyePoints      []coord `json:"eyes,omitempty"`
 	LandmarkPoints []coord `json:"landmark_points,omitempty"`
+	FacePoints     coord   `json:"face,omitempty"`
 }
 
 func main() {

core/pigo.go

@@ -14,11 +14,11 @@ import (
 // ShiftFactor: determines to what percentage to move the detection window over its size.
 // ScaleFactor: defines in percentage the resize value of the detection window when moving to a higher scale.
 type CascadeParams struct {
+	ImageParams
 	MinSize     int
 	MaxSize     int
 	ShiftFactor float64
 	ScaleFactor float64
-	ImageParams
 }
 
 // ImageParams is a struct for image related settings.
@@ -35,11 +35,11 @@ type ImageParams struct {
 
 // Pigo struct defines the basic binary tree components.
 type Pigo struct {
-	treeDepth     uint32
-	treeNum       uint32
 	treeCodes     []int8
 	treePred      []float32
 	treeThreshold []float32
+	treeDepth     uint32
+	treeNum       uint32
 }
 
 // NewPigo initializes the Pigo constructor method.
@@ -101,11 +101,11 @@ func (pg *Pigo) Unpack(packet []byte) (*Pigo, error) {
 	}
 
 	return &Pigo{
-		treeDepth,
-		treeNum,
 		treeCodes,
 		treePred,
 		treeThreshold,
+		treeDepth,
+		treeNum,
 	}, nil
 }
 

core/puploc.go

@@ -21,12 +21,12 @@ type Puploc struct {
 // PuplocCascade is a general struct for storing
 // the cascade tree values encoded into the binary file.
 type PuplocCascade struct {
-	stages    uint32
-	scales    float32
-	trees     uint32
-	treeDepth uint32
 	treeCodes []int8
 	treePreds []float32
+	scales    float32
+	stages    uint32
+	trees     uint32
+	treeDepth uint32
 }
 
 // NewPuplocCascade initializes the PuplocCascade constructor method.
@@ -237,7 +237,7 @@ var plcPool = sync.Pool{
 
 // RunDetector runs the pupil localization function.
 func (plc *PuplocCascade) RunDetector(pl Puploc, img ImageParams, angle float64, flipV bool) *Puploc {
-	var res = make([]float32, 3)
+	var res []float32
 
 	det := plcPool.Get().(*puplocPool)
 	defer plcPool.Put(det)