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Version: v1.12

Tips

Reuse VM‚Äč

It is possible to reuse a virtual machine between re-runs on the program. In some cases, it can add a small increase in performance (~10%).

package main

import (
"fmt"
"github.com/antonmedv/expr"
"github.com/antonmedv/expr/vm"
)

func main() {
env := map[string]interface{}{
"foo": 1,
"bar": 2,
}

program, err := expr.Compile("foo + bar", expr.Env(env))
if err != nil {
panic(err)
}

// Reuse this vm instance between runs
v := vm.VM{}

out, err := v.Run(program, env)
if err != nil {
panic(err)
}

fmt.Print(out)
}