debug: print time of all benchmarks done

Author: milahu

src/bin.js

@@ -151,9 +151,14 @@ async function main() {
         duration: program.duration || 5000,
         executions: program.executions || 1000000
     };
+
+    const t1 = Date.now()
+
     const result = await runBenchmark(input, previous, options);
 
-    debug && console.log('\n' + `bipbip: result done`)
+    const t2 = Date.now()
+
+    debug && console.log('\n' + `bipbip: all benchmarks done in ${(t2 - t1) / 1000} seconds`)
 
     if (program.save) {
         debug && console.log('\n' + `bipbip: save ${program.save} ...`)