Add benchmark subcommand

.gitignore

@@ -1,2 +1,3 @@
 _site
 /gojekyll
+*.prof

cmd/gojekyll/commands.go

@@ -28,12 +28,25 @@ func buildCommand(c *cli.Context, site *gojekyll.Site) error {
 	if err != nil {
 		return err
 	}
-
 	elapsed := time.Since(commandStartTime)
 	printSetting("", fmt.Sprintf("created %d files in %.2fs.", count, elapsed.Seconds()))
 	return nil
 }
 
+func benchmarkCommand(c *cli.Context, site *gojekyll.Site) error {
+	printSetting("Generating...", "")
+	for i := 0; i < 10; i++ {
+		printSetting("", fmt.Sprintf("%d", i+1))
+		_, err := site.Build(buildOptions)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+	// elapsed := time.Since(commandStartTime)
+	// printSetting("", fmt.Sprintf("created %d files in %.2fs.", count, elapsed.Seconds()))
+}
+
 func serveCommand(c *cli.Context, site *gojekyll.Site) error {
 	server := gojekyll.Server{Site: site}
 	return server.Run(printSetting)

cmd/gojekyll/main.go

@@ -2,8 +2,10 @@ package main
 
 import (
 	"fmt"
+	"log"
 	"os"
 	"path/filepath"
+	"runtime/pprof"
 
 	"github.com/osteele/gojekyll"
 	"github.com/osteele/gojekyll/helpers"
@@ -76,6 +78,18 @@ func main() {
 			Action: withSite(buildCommand),
 		},
 		{
+			Name:    "benchmark",
+			Aliases: []string{"b"},
+			Usage:   "Benchmark",
+			Flags: []cli.Flag{
+				cli.BoolFlag{
+					Name:        "dry-run, n",
+					Usage:       "Dry run",
+					Destination: &buildOptions.DryRun,
+				},
+			},
+			Action: withSite(benchmarkCommand),
+		}, {
 			Name:    "data",
 			Aliases: []string{"b"},
 			Action:  withSite(dataCommand),
@@ -96,5 +110,14 @@ func main() {
 		},
 	}
 
+	if true {
+		f, err := os.Create("gojekyll.prof")
+		if err != nil {
+			log.Fatal(err)
+		}
+		pprof.StartCPUProfile(f)
+		defer pprof.StopCPUProfile()
+	}
+
 	_ = app.Run(os.Args)
 }