diff --git a/cmd/lotus-bench/import.go b/cmd/lotus-bench/import.go
index f6b85b557..6caff50a7 100644
--- a/cmd/lotus-bench/import.go
+++ b/cmd/lotus-bench/import.go
@@ -360,6 +360,7 @@ var importAnalyzeCmd = &cli.Command{
 					}
 
 					totalTime += tse.Duration
+					var execStack = make([]types.ExecutionTrace, 0, 100)
 					for _, inv := range tse.Trace {
 						if inv.Duration > leastExpensiveInvoc {
 							expensiveInvocs = append(expensiveInvocs, Invocation{
@@ -367,8 +368,33 @@ var importAnalyzeCmd = &cli.Command{
 								Invoc:  inv,
 							})
 						}
+						execStack = append(execStack, inv.ExecutionTrace)
+						for len(execStack) != 0 {
+							et := execStack[len(execStack)-1]
+							execStack = execStack[:len(execStack)-1]
+							for _, gc := range et.GasCharges {
 
-						tallyGasCharges(chargeStats, inv.ExecutionTrace)
+								compGas := gc.ComputeGas
+								if compGas == 0 {
+									compGas = 1
+								}
+
+								ratio := float64(compGas) / float64(gc.TimeTaken.Nanoseconds())
+								ratio = 1 / ratio
+								if math.IsNaN(ratio) {
+									log.Errorf("NaN: comGas: %f, taken: %d", compGas, gc.TimeTaken.Nanoseconds())
+								}
+
+								s := chargeStats[gc.Name]
+								if s == nil {
+									s = new(stats)
+									chargeStats[gc.Name] = s
+								}
+
+								s.AddPoint(ratio)
+							}
+							execStack = append(execStack, et.Subcalls...)
+						}
 					}
 					if len(expensiveInvocs) > 4*invocsKeep {
 						sort.Slice(expensiveInvocs, func(i, j int) bool {