feat: use the number of CPUs in the machine as the default worker count

cmd/templ/main.go

@@ -4,6 +4,7 @@ import (
 	"flag"
 	"fmt"
 	"os"
+	"runtime"
 	"runtime/debug"
 
 	"github.com/a-h/templ"
@@ -76,7 +77,7 @@ func generateCmd(args []string) {
 	fileName := cmd.String("f", "", "Optionally generates code for a single file, e.g. -f header.templ")
 	path := cmd.String("path", ".", "Generates code for all files in path.")
 	sourceMapVisualisations := cmd.Bool("sourceMapVisualisations", false, "Set to true to generate HTML files to visualise the templ code and its corresponding Go code.")
-	workerCount := cmd.Int("w", 4, "Number of workers to run in parallel.")
+	workerCount := cmd.Int("w", runtime.NumCPU(), "Number of workers to run in parallel.")
 	helpFlag := cmd.Bool("help", false, "Print help and exit.")
 	err := cmd.Parse(args)
 	if err != nil || *helpFlag {