Part 1: Optimize using compiler's inliner (#2687)

* optimized functions for inlining

* added note regarding ResponseWriterWrapper

* optimzed browseWrite* methods for FileServer

* created benchmarks for comparison

* creating browseListing instance in each function

* created benchmarks for openResponseWriter

* removed benchmarks of old implementations

* implemented sync.Pool for byte buffers

* using global sync.Pool for writing JSON/HTML

1 files changed, 54 insertions, 0 deletions

diff --git a/modules/caddyhttp/fileserver/browse_test.go b/modules/caddyhttp/fileserver/browse_test.go
new file mode 100644
index 0000000..b1f7092
--- /dev/null
+++ b/modules/caddyhttp/fileserver/browse_test.go
@@ -0,0 +1,54 @@
+package fileserver
+
+import (
+	"html/template"
+	"testing"
+
+	"github.com/caddyserver/caddy/v2"
+)
+
+func BenchmarkBrowseWriteJSON(b *testing.B) {
+	fsrv := new(FileServer)
+	fsrv.Provision(caddy.Context{})
+	listing := browseListing{
+		Name:           "test",
+		Path:           "test",
+		CanGoUp:        false,
+		Items:          make([]fileInfo, 100),
+		NumDirs:        42,
+		NumFiles:       420,
+		Sort:           "",
+		Order:          "",
+		ItemsLimitedTo: 42,
+	}
+	b.ResetTimer()
+
+	for n := 0; n < b.N; n++ {
+		fsrv.browseWriteJSON(listing)
+	}
+}
+
+func BenchmarkBrowseWriteHTML(b *testing.B) {
+	fsrv := new(FileServer)
+	fsrv.Provision(caddy.Context{})
+	fsrv.Browse = &Browse{
+		TemplateFile: "",
+		template:     template.New("test"),
+	}
+	listing := browseListing{
+		Name:           "test",
+		Path:           "test",
+		CanGoUp:        false,
+		Items:          make([]fileInfo, 100),
+		NumDirs:        42,
+		NumFiles:       420,
+		Sort:           "",
+		Order:          "",
+		ItemsLimitedTo: 42,
+	}
+	b.ResetTimer()
+
+	for n := 0; n < b.N; n++ {
+		fsrv.browseWriteHTML(listing)
+	}
+}