Mono repo -> Master (#22553)

Combines the following repositories into one:

https://github.com/mattermost/mattermost-server
https://github.com/mattermost/mattermost-webapp
https://github.com/mattermost/focalboard
https://github.com/mattermost/mattermost-plugin-playbooks

server/channels/app/imaging/decode_bench_test.go

@@ -0,0 +1,89 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package imaging
+
+import (
+	"fmt"
+	"os"
+	"runtime"
+	"sync"
+	"testing"
+
+	"github.com/mattermost/mattermost-server/v6/server/channels/utils/fileutils"
+
+	"github.com/stretchr/testify/require"
+)
+
+func BenchmarkDecoderDecode(b *testing.B) {
+	n := runtime.NumCPU()
+	for k := 1; k <= n; k++ {
+		b.Run(fmt.Sprintf("%d concurrency", k), func(b *testing.B) {
+			d, err := NewDecoder(DecoderOptions{
+				ConcurrencyLevel: k,
+			})
+			require.NotNil(b, d)
+			require.NoError(b, err)
+
+			imgDir, ok := fileutils.FindDir("tests")
+			require.True(b, ok)
+
+			b.ResetTimer()
+
+			var wg sync.WaitGroup
+			for i := 0; i < b.N; i++ {
+				b.StopTimer()
+				wg.Add(1)
+				imgFile, err := os.Open(imgDir + "/fill_test_opaque.png")
+				require.NoError(b, err)
+				defer imgFile.Close()
+				b.StartTimer()
+				go func() {
+					defer wg.Done()
+					img, _, err := d.Decode(imgFile)
+					require.NoError(b, err)
+					require.NotNil(b, img)
+				}()
+			}
+
+			wg.Wait()
+		})
+	}
+}
+
+func BenchmarkDecoderDecodeMemBounded(b *testing.B) {
+	n := runtime.NumCPU()
+	for k := 1; k <= n; k++ {
+		b.Run(fmt.Sprintf("%d concurrency", k), func(b *testing.B) {
+			d, err := NewDecoder(DecoderOptions{
+				ConcurrencyLevel: k,
+			})
+			require.NotNil(b, d)
+			require.NoError(b, err)
+
+			imgDir, ok := fileutils.FindDir("tests")
+			require.True(b, ok)
+
+			b.ResetTimer()
+
+			var wg sync.WaitGroup
+			for i := 0; i < b.N; i++ {
+				b.StopTimer()
+				wg.Add(1)
+				imgFile, err := os.Open(imgDir + "/fill_test_opaque.png")
+				require.NoError(b, err)
+				defer imgFile.Close()
+				b.StartTimer()
+				go func() {
+					defer wg.Done()
+					img, _, release, err := d.DecodeMemBounded(imgFile)
+					require.NoError(b, err)
+					require.NotNil(b, img)
+					release()
+				}()
+			}
+
+			wg.Wait()
+		})
+	}
+}