Merge pull request #84462 from MewPurPur/optimize-humanizesize

Optimize `String.humanize_size()`

core/string/ustring.cpp

@@ -3961,27 +3961,42 @@ static int _humanize_digits(int p_num) {
 }
 
 String String::humanize_size(uint64_t p_size) {
+	int magnitude = 0;
 	uint64_t _div = 1;
-	Vector<String> prefixes;
-	prefixes.push_back(RTR("B"));
-	prefixes.push_back(RTR("KiB"));
-	prefixes.push_back(RTR("MiB"));
-	prefixes.push_back(RTR("GiB"));
-	prefixes.push_back(RTR("TiB"));
-	prefixes.push_back(RTR("PiB"));
-	prefixes.push_back(RTR("EiB"));
-
-	int prefix_idx = 0;
-
-	while (prefix_idx < prefixes.size() - 1 && p_size > (_div * 1024)) {
+	while (p_size > _div * 1024 && magnitude < 6) {
 		_div *= 1024;
-		prefix_idx++;
+		magnitude++;
 	}
 
-	const int digits = prefix_idx > 0 ? _humanize_digits(p_size / _div) : 0;
-	const double divisor = prefix_idx > 0 ? _div : 1;
+	if (magnitude == 0) {
+		return String::num(p_size) + " " + RTR("B");
+	} else {
+		String suffix;
+		switch (magnitude) {
+			case 1:
+				suffix = RTR("KiB");
+				break;
+			case 2:
+				suffix = RTR("MiB");
+				break;
+			case 3:
+				suffix = RTR("GiB");
+				break;
+			case 4:
+				suffix = RTR("TiB");
+				break;
+			case 5:
+				suffix = RTR("PiB");
+				break;
+			case 6:
+				suffix = RTR("EiB");
+				break;
+		}
 
-	return String::num(p_size / divisor).pad_decimals(digits) + " " + prefixes[prefix_idx];
+		const double divisor = _div;
+		const int digits = _humanize_digits(p_size / _div);
+		return String::num(p_size / divisor).pad_decimals(digits) + " " + suffix;
+	}
 }
 
 bool String::is_absolute_path() const {