Reduces view refresh freq for fetch time

Author: eamodio

src/git/utils/fetch.utils.ts

@@ -2,9 +2,47 @@ const millisecondsPerMinute = 60 * 1000;
 const millisecondsPerHour = 60 * 60 * 1000;
 export const millisecondsPerDay = 24 * 60 * 60 * 1000;
 
+/**
+ * Calculates the update interval for fetch status based on how long ago the last fetch occurred.
+ * Uses stepped intervals to prevent thrashing from frequent recalculations.
+ *
+ * @param lastFetched - Timestamp (in milliseconds) of the last fetch
+ * @returns Update interval in milliseconds
+ *
+ * Interval schedule:
+ * - < 15 minutes ago: refresh every 5 minutes
+ * - < 30 minutes ago: refresh every 10 minutes
+ * - < 1 hour ago: refresh every 20 minutes
+ * - < 3 hours ago: refresh every 1 hour
+ * - < 6 hours ago: refresh every 2 hours
+ * - < 12 hours ago: refresh every 4 hours
+ * - < 2 days ago: refresh every 8 hours
+ * - ≥ 2 days ago: refresh every 1 day
+ */
 export function getLastFetchedUpdateInterval(lastFetched: number): number {
 	const timeDiff = Date.now() - lastFetched;
-	return timeDiff < millisecondsPerDay
-		? (timeDiff < millisecondsPerHour ? millisecondsPerMinute : millisecondsPerHour) / 2
-		: 0;
+
+	// Stepped intervals to prevent thrashing
+	if (timeDiff < 15 * millisecondsPerMinute) {
+		return 5 * millisecondsPerMinute;
+	}
+	if (timeDiff < 30 * millisecondsPerMinute) {
+		return 10 * millisecondsPerMinute;
+	}
+	if (timeDiff < millisecondsPerHour) {
+		return 20 * millisecondsPerMinute;
+	}
+	if (timeDiff < 3 * millisecondsPerHour) {
+		return millisecondsPerHour;
+	}
+	if (timeDiff < 6 * millisecondsPerHour) {
+		return 2 * millisecondsPerHour;
+	}
+	if (timeDiff < 12 * millisecondsPerHour) {
+		return 4 * millisecondsPerHour;
+	}
+	if (timeDiff < 2 * millisecondsPerDay) {
+		return 8 * millisecondsPerHour;
+	}
+	return millisecondsPerDay;
 }