simplify normalizeUnit function

Author: ktrz

src/normalizeUnit.ts

@@ -1,29 +1,13 @@
 export function normalizeUnit(prevUnit: string, currentUnit: string, value: number): number {
-    const prevUnitIndex = TIME_UNITS.indexOf(prevUnit);
-    const currentUnitIndex = TIME_UNITS.indexOf(currentUnit);
+    for (const units of SUPPORTED_UNITS) {
+        const prevUnitIndex = units.indexOf(prevUnit);
+        const currentUnitIndex = units.indexOf(currentUnit);
 
-    if (prevUnitIndex >= 0 && currentUnitIndex >= 0) {
-        const unitDiff = prevUnitIndex - currentUnitIndex;
+        if (prevUnitIndex >= 0 && currentUnitIndex >= 0) {
+            const unitDiff = prevUnitIndex - currentUnitIndex;
 
-        return value * 1000 ** unitDiff;
-    }
-
-    const prevUnitIndex2 = ITER_UNITS.indexOf(prevUnit);
-    const currentUnitIndex2 = ITER_UNITS.indexOf(currentUnit);
-
-    if (prevUnitIndex2 >= 0 && currentUnitIndex2 >= 0) {
-        const unitDiff = prevUnitIndex2 - currentUnitIndex2;
-
-        return value * 1000 ** unitDiff;
-    }
-
-    const prevUnitIndex3 = OPS_PER_TIME_UNIT.indexOf(prevUnit);
-    const currentUnitIndex3 = OPS_PER_TIME_UNIT.indexOf(currentUnit);
-
-    if (prevUnitIndex3 >= 0 && currentUnitIndex3 >= 0) {
-        const unitDiff = prevUnitIndex3 - currentUnitIndex3;
-
-        return value * 1000 ** unitDiff;
+            return value * 1000 ** unitDiff;
+        }
     }
 
     return value;
@@ -32,3 +16,4 @@ export function normalizeUnit(prevUnit: string, currentUnit: string, value: numb
 const TIME_UNITS = ['s', 'ms', 'us', 'ns'];
 const ITER_UNITS = TIME_UNITS.map((unit) => `${unit}/iter`);
 const OPS_PER_TIME_UNIT = [...TIME_UNITS].reverse().map((unit) => `ops/${unit}`);
+const SUPPORTED_UNITS = [TIME_UNITS, ITER_UNITS, OPS_PER_TIME_UNIT];