pstats, xstats: print methods, pointer receiver

benchmarks: same timings/allocations

Author: wkhere

api.go

@@ -100,7 +100,7 @@ func parseWithOpts(inputs <-chan string, name string, opts []Option) (*Prog, err
 		prog.disasm()
 	}
 	if cf.stats {
-		printPStats(cf.output, pstats)
+		pstats.print(cf.output)
 	}
 	return prog, err
 }
@@ -122,7 +122,7 @@ func Execute(prog *Prog, opts ...Option) (result []Block, binding Binding, err e
 
 	result, binding, xstats, err := execute(prog, vmConfig{cf.trace})
 	if cf.stats {
-		printXStats(cf.output, xstats)
+		xstats.print(cf.output)
 	}
 	return result, binding, err
 }

util.go

@@ -20,7 +20,7 @@ type writers struct {
 	outw, logw io.Writer
 }
 
-func printPStats(w io.Writer, pstats parseStats) {
+func (pstats *parseStats) print(w io.Writer) {
 	fmt.Fprintf(w, "pstats.tokens:     %5d\n", pstats.tokens)
 	fmt.Fprintf(w, "pstats.localMax:   %5d\n", pstats.localMax)
 	fmt.Fprintf(w, "pstats.depthMax:   %5d\n", pstats.depthMax)
@@ -29,7 +29,7 @@ func printPStats(w io.Writer, pstats parseStats) {
 	fmt.Fprintf(w, "pstats.codeBytes:  %5d\n", pstats.codeBytes)
 }
 
-func printXStats(w io.Writer, xstats execStats) {
+func (xstats *execStats) print(w io.Writer) {
 	fmt.Fprintf(w, "xstats.tosMax:     %5d\n", xstats.tosMax)
 	fmt.Fprintf(w, "xstats.blockTosMax:%5d\n", xstats.blockTosMax)
 	fmt.Fprintf(w, "xstats.opsRead:    %5d\n", xstats.opsRead)