mirror of
https://github.com/netbirdio/netbird.git
synced 2026-05-19 15:19:55 +00:00
365 lines
9.1 KiB
Go
365 lines
9.1 KiB
Go
//go:build !js && !ios && !android
|
||
|
||
package server
|
||
|
||
import (
|
||
"image"
|
||
"math/rand"
|
||
"testing"
|
||
)
|
||
|
||
// Representative frame sizes.
|
||
var benchRects = []struct {
|
||
name string
|
||
w, h int
|
||
}{
|
||
{"1080p_full", 1920, 1080},
|
||
{"720p_full", 1280, 720},
|
||
{"256x256_tile", 256, 256},
|
||
{"64x64_tile", 64, 64},
|
||
}
|
||
|
||
func makeBenchImage(w, h int, seed int64) *image.RGBA {
|
||
img := image.NewRGBA(image.Rect(0, 0, w, h))
|
||
r := rand.New(rand.NewSource(seed))
|
||
_, _ = r.Read(img.Pix)
|
||
// Force alpha byte so the fast path and slow path produce identical output.
|
||
for i := 3; i < len(img.Pix); i += 4 {
|
||
img.Pix[i] = 0xff
|
||
}
|
||
return img
|
||
}
|
||
|
||
func makeBenchImagePartial(w, h, changedRows int) (*image.RGBA, *image.RGBA) {
|
||
prev := makeBenchImage(w, h, 1)
|
||
cur := image.NewRGBA(prev.Rect)
|
||
copy(cur.Pix, prev.Pix)
|
||
if changedRows > h {
|
||
changedRows = h
|
||
}
|
||
// Dirty the first `changedRows` rows.
|
||
r := rand.New(rand.NewSource(2))
|
||
_, _ = r.Read(cur.Pix[:changedRows*cur.Stride])
|
||
for i := 3; i < len(cur.Pix); i += 4 {
|
||
cur.Pix[i] = 0xff
|
||
}
|
||
return prev, cur
|
||
}
|
||
|
||
func BenchmarkEncodeRawRect(b *testing.B) {
|
||
pf := defaultClientPixelFormat()
|
||
for _, r := range benchRects {
|
||
img := makeBenchImage(r.w, r.h, 1)
|
||
b.Run(r.name, func(b *testing.B) {
|
||
b.SetBytes(int64(r.w * r.h * 4))
|
||
b.ReportAllocs()
|
||
for i := 0; i < b.N; i++ {
|
||
_ = encodeRawRect(img, pf, 0, 0, r.w, r.h)
|
||
}
|
||
})
|
||
}
|
||
}
|
||
|
||
func BenchmarkEncodeTightRect(b *testing.B) {
|
||
pf := defaultClientPixelFormat()
|
||
for _, r := range benchRects {
|
||
img := makeBenchImage(r.w, r.h, 1)
|
||
t := newTightState()
|
||
b.Run(r.name, func(b *testing.B) {
|
||
b.SetBytes(int64(r.w * r.h * 4))
|
||
b.ReportAllocs()
|
||
for i := 0; i < b.N; i++ {
|
||
_ = encodeTightRect(img, pf, 0, 0, r.w, r.h, t)
|
||
}
|
||
})
|
||
}
|
||
}
|
||
|
||
// BenchmarkWritePixels isolates the per-pixel pack loop from the allocation
|
||
// and FramebufferUpdate-header overhead.
|
||
func BenchmarkWritePixels(b *testing.B) {
|
||
pf := defaultClientPixelFormat()
|
||
for _, r := range benchRects {
|
||
img := makeBenchImage(r.w, r.h, 1)
|
||
dst := make([]byte, r.w*r.h*4)
|
||
b.Run(r.name, func(b *testing.B) {
|
||
b.SetBytes(int64(r.w * r.h * 4))
|
||
b.ReportAllocs()
|
||
for i := 0; i < b.N; i++ {
|
||
writePixels(dst, img, pf, rect{0, 0, r.w, r.h})
|
||
}
|
||
})
|
||
}
|
||
}
|
||
|
||
func BenchmarkSwizzleBGRAtoRGBA(b *testing.B) {
|
||
for _, r := range benchRects {
|
||
size := r.w * r.h * 4
|
||
src := make([]byte, size)
|
||
dst := make([]byte, size)
|
||
rng := rand.New(rand.NewSource(1))
|
||
_, _ = rng.Read(src)
|
||
b.Run(r.name, func(b *testing.B) {
|
||
b.SetBytes(int64(size))
|
||
b.ReportAllocs()
|
||
for i := 0; i < b.N; i++ {
|
||
swizzleBGRAtoRGBA(dst, src)
|
||
}
|
||
})
|
||
}
|
||
}
|
||
|
||
// BenchmarkSwizzleBGRAtoRGBANaive is the naive byte-by-byte implementation
|
||
// that the Linux SHM capturer used before the uint32 rewrite, kept here so
|
||
// we can compare the cost directly.
|
||
func BenchmarkSwizzleBGRAtoRGBANaive(b *testing.B) {
|
||
for _, r := range benchRects {
|
||
size := r.w * r.h * 4
|
||
src := make([]byte, size)
|
||
dst := make([]byte, size)
|
||
rng := rand.New(rand.NewSource(1))
|
||
_, _ = rng.Read(src)
|
||
b.Run(r.name, func(b *testing.B) {
|
||
b.SetBytes(int64(size))
|
||
b.ReportAllocs()
|
||
for i := 0; i < b.N; i++ {
|
||
for j := 0; j < size; j += 4 {
|
||
dst[j+0] = src[j+2]
|
||
dst[j+1] = src[j+1]
|
||
dst[j+2] = src[j+0]
|
||
dst[j+3] = 0xff
|
||
}
|
||
}
|
||
})
|
||
}
|
||
}
|
||
|
||
// BenchmarkEncodeUniformTile_TightFill measures the fast path for a uniform
|
||
// 64×64 tile via Tight's Fill subencoding (16 wire bytes regardless of size).
|
||
func BenchmarkEncodeUniformTile_TightFill(b *testing.B) {
|
||
pf := defaultClientPixelFormat()
|
||
img := image.NewRGBA(image.Rect(0, 0, 64, 64))
|
||
for i := 0; i < len(img.Pix); i += 4 {
|
||
img.Pix[i+0] = 0x33
|
||
img.Pix[i+1] = 0x66
|
||
img.Pix[i+2] = 0x99
|
||
img.Pix[i+3] = 0xff
|
||
}
|
||
t := newTightState()
|
||
b.ReportAllocs()
|
||
var bytesOut int
|
||
for i := 0; i < b.N; i++ {
|
||
out := encodeTightRect(img, pf, 0, 0, 64, 64, t)
|
||
bytesOut = len(out)
|
||
}
|
||
b.ReportMetric(float64(bytesOut), "wire_bytes")
|
||
}
|
||
|
||
func BenchmarkTileIsUniform(b *testing.B) {
|
||
img := image.NewRGBA(image.Rect(0, 0, 64, 64))
|
||
for i := 0; i < len(img.Pix); i += 4 {
|
||
img.Pix[i+3] = 0xff
|
||
}
|
||
b.ReportAllocs()
|
||
for i := 0; i < b.N; i++ {
|
||
_, _ = tileIsUniform(img, 0, 0, 64, 64)
|
||
}
|
||
}
|
||
|
||
// BenchmarkEncodeManyTilesVsFullFrame exercises the bandwidth + CPU
|
||
// trade-off that motivates the full-frame promotion path: encoding a burst
|
||
// of N dirty 64×64 tiles as separate Tight rects vs emitting one big Tight
|
||
// rect for the whole frame.
|
||
func BenchmarkEncodeManyTilesVsFullFrame(b *testing.B) {
|
||
pf := defaultClientPixelFormat()
|
||
const w, h = 1920, 1080
|
||
img := makeBenchImage(w, h, 1)
|
||
|
||
// Build the list of every tile in the frame (worst case: entire screen dirty).
|
||
var tiles [][4]int
|
||
for ty := 0; ty < h; ty += tileSize {
|
||
th := tileSize
|
||
if ty+th > h {
|
||
th = h - ty
|
||
}
|
||
for tx := 0; tx < w; tx += tileSize {
|
||
tw := tileSize
|
||
if tx+tw > w {
|
||
tw = w - tx
|
||
}
|
||
tiles = append(tiles, [4]int{tx, ty, tw, th})
|
||
}
|
||
}
|
||
nTiles := len(tiles)
|
||
|
||
b.Run("per_tile_tight", func(b *testing.B) {
|
||
t := newTightState()
|
||
b.SetBytes(int64(w * h * 4))
|
||
b.ReportAllocs()
|
||
var totalOut int
|
||
for i := 0; i < b.N; i++ {
|
||
totalOut = 0
|
||
for _, r := range tiles {
|
||
out := encodeTightRect(img, pf, r[0], r[1], r[2], r[3], t)
|
||
totalOut += len(out)
|
||
}
|
||
}
|
||
b.ReportMetric(float64(totalOut), "wire_bytes")
|
||
b.ReportMetric(float64(nTiles), "tiles")
|
||
})
|
||
|
||
b.Run("full_frame_tight", func(b *testing.B) {
|
||
t := newTightState()
|
||
b.SetBytes(int64(w * h * 4))
|
||
b.ReportAllocs()
|
||
var totalOut int
|
||
for i := 0; i < b.N; i++ {
|
||
out := encodeTightRect(img, pf, 0, 0, w, h, t)
|
||
totalOut = len(out)
|
||
}
|
||
b.ReportMetric(float64(totalOut), "wire_bytes")
|
||
})
|
||
}
|
||
|
||
// BenchmarkShouldPromoteToFullFrame verifies the threshold check itself is
|
||
// cheap. It runs on every frame, so regressions here hit all workloads.
|
||
func BenchmarkShouldPromoteToFullFrame(b *testing.B) {
|
||
const w, h = 1920, 1080
|
||
s := &session{serverW: w, serverH: h}
|
||
// Build a worst-case rect list (every tile dirty, 510 entries).
|
||
var rects [][4]int
|
||
for ty := 0; ty < h; ty += tileSize {
|
||
th := tileSize
|
||
if ty+th > h {
|
||
th = h - ty
|
||
}
|
||
for tx := 0; tx < w; tx += tileSize {
|
||
tw := tileSize
|
||
if tx+tw > w {
|
||
tw = w - tx
|
||
}
|
||
rects = append(rects, [4]int{tx, ty, tw, th})
|
||
}
|
||
}
|
||
b.ReportAllocs()
|
||
for i := 0; i < b.N; i++ {
|
||
_ = s.shouldPromoteToFullFrame(rects)
|
||
}
|
||
}
|
||
|
||
// BenchmarkEncodeCoalescedVsPerTile compares per-tile encoding vs the
|
||
// coalesced rect list emitted by diffRects, on a horizontal-band dirty
|
||
// pattern (e.g. a scrolling status bar) where coalescing pays off.
|
||
func BenchmarkEncodeCoalescedVsPerTile(b *testing.B) {
|
||
pf := defaultClientPixelFormat()
|
||
const w, h = 1920, 1080
|
||
img := makeBenchImage(w, h, 1)
|
||
|
||
// Dirty band: rows 200..264 (one tile-row), full width.
|
||
var perTile [][4]int
|
||
for tx := 0; tx < w; tx += tileSize {
|
||
tw := tileSize
|
||
if tx+tw > w {
|
||
tw = w - tx
|
||
}
|
||
perTile = append(perTile, [4]int{tx, 200, tw, tileSize})
|
||
}
|
||
coalesced := coalesceRects(append([][4]int(nil), perTile...))
|
||
|
||
b.Run("per_tile", func(b *testing.B) {
|
||
t := newTightState()
|
||
b.ReportAllocs()
|
||
var bytesOut int
|
||
for i := 0; i < b.N; i++ {
|
||
bytesOut = 0
|
||
for _, r := range perTile {
|
||
out := encodeTightRect(img, pf, r[0], r[1], r[2], r[3], t)
|
||
bytesOut += len(out)
|
||
}
|
||
}
|
||
b.ReportMetric(float64(bytesOut), "wire_bytes")
|
||
b.ReportMetric(float64(len(perTile)), "rects")
|
||
})
|
||
|
||
b.Run("coalesced", func(b *testing.B) {
|
||
t := newTightState()
|
||
b.ReportAllocs()
|
||
var bytesOut int
|
||
for i := 0; i < b.N; i++ {
|
||
bytesOut = 0
|
||
for _, r := range coalesced {
|
||
out := encodeTightRect(img, pf, r[0], r[1], r[2], r[3], t)
|
||
bytesOut += len(out)
|
||
}
|
||
}
|
||
b.ReportMetric(float64(bytesOut), "wire_bytes")
|
||
b.ReportMetric(float64(len(coalesced)), "rects")
|
||
})
|
||
}
|
||
|
||
func BenchmarkCoalesceRects(b *testing.B) {
|
||
const w, h = 1920, 1080
|
||
// Worst case: every tile dirty.
|
||
var allTiles [][4]int
|
||
for ty := 0; ty < h; ty += tileSize {
|
||
th := tileSize
|
||
if ty+th > h {
|
||
th = h - ty
|
||
}
|
||
for tx := 0; tx < w; tx += tileSize {
|
||
tw := tileSize
|
||
if tx+tw > w {
|
||
tw = w - tx
|
||
}
|
||
allTiles = append(allTiles, [4]int{tx, ty, tw, th})
|
||
}
|
||
}
|
||
b.ReportAllocs()
|
||
for i := 0; i < b.N; i++ {
|
||
in := make([][4]int, len(allTiles))
|
||
copy(in, allTiles)
|
||
_ = coalesceRects(in)
|
||
}
|
||
}
|
||
|
||
// BenchmarkEncodeTight_Photo measures Tight on random/photographic content.
|
||
// The internal sampledColorCount gate routes large many-colour rects to JPEG
|
||
// at quality 70.
|
||
func BenchmarkEncodeTight_Photo(b *testing.B) {
|
||
pf := defaultClientPixelFormat()
|
||
for _, r := range []struct {
|
||
name string
|
||
w, h int
|
||
}{
|
||
{"256x256", 256, 256},
|
||
{"512x512", 512, 512},
|
||
{"1080p", 1920, 1080},
|
||
} {
|
||
img := makeBenchImage(r.w, r.h, 1)
|
||
b.Run(r.name+"/tight", func(b *testing.B) {
|
||
t := newTightState()
|
||
b.SetBytes(int64(r.w * r.h * 4))
|
||
b.ReportAllocs()
|
||
var bytesOut int
|
||
for i := 0; i < b.N; i++ {
|
||
out := encodeTightRect(img, pf, 0, 0, r.w, r.h, t)
|
||
bytesOut = len(out)
|
||
}
|
||
b.ReportMetric(float64(bytesOut), "wire_bytes")
|
||
})
|
||
}
|
||
}
|
||
|
||
func BenchmarkDiffRects(b *testing.B) {
|
||
for _, r := range benchRects {
|
||
prev, cur := makeBenchImagePartial(r.w, r.h, 100)
|
||
b.Run(r.name, func(b *testing.B) {
|
||
b.SetBytes(int64(r.w * r.h * 4))
|
||
b.ReportAllocs()
|
||
for i := 0; i < b.N; i++ {
|
||
_ = diffRects(prev, cur, r.w, r.h, tileSize)
|
||
}
|
||
})
|
||
}
|
||
}
|