v8 isolates sharing compiled scripts / cached data

main.go

package main

import (
	"fmt"
	"time"

	v8 "rogchap.com/v8go"
)

func main() {
	s := "function foo() { return 'bar'; }; foo()"

	for i := 0; i < 10; i++ {
		iso := v8.NewIsolate()
		ctx := v8.NewContext(iso)

		start := time.Now()
		ctx.RunScript(s, "script.js")
		fmt.Printf("RunScript in iso %d: %s\n", i, time.Since(start))

		ctx.Close()
		iso.Dispose()
	}
}

results

go run main.go
RunScript in iso 0: 328.929µs
RunScript in iso 1: 55.516µs
RunScript in iso 2: 53.565µs
RunScript in iso 3: 59.998µs
RunScript in iso 4: 76.415µs
RunScript in iso 5: 49.581µs
RunScript in iso 6: 50.965µs
RunScript in iso 7: 51.065µs
RunScript in iso 8: 48.945µs
RunScript in iso 9: 65.047µs