jondlm · October 1, 2015 22:32 · Oct 1, 2015
diff --git a/webpack_bundle_analysis.go b/webpack_bundle_analysis.go
@@ -0,0 +1,46 @@
+// Make sure you have a `bundle.js` file in the current dir and run this like:
+// # go run webpack_bundle_analysis.go | sort -n
+
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"regexp"
+	"strings"
+)
+
+func check(e error) {
+	if e != nil {
+		panic(e)
+	}
+}
+
+func main() {
+	re := regexp.MustCompile("[*] [0-9]+ [*]")
+	m := make(map[string]int)
+
+	dat, err := ioutil.ReadFile("./bundle.js")
+	check(err)
+
+	lines := strings.Split(string(dat), "\n")
+
+	cur := ""
+
+	for _, line := range lines {
+		if re.MatchString(line) {
+			cur = line
+		} else {
+			if _, ok := m[cur]; ok {
+				m[cur] = m[cur] + len(line)
+			} else {
+				m[cur] = 0
+			}
+		}
+	}
+
+	total := float64(len(string(dat)))
+	for k, v := range m {
+		fmt.Printf("%d -- %s -- %f%% of total\n", v, k, float64(v)/total*100)
+	}
+}