Merge pull request #4108 from benrubson/issue3982-3

Make auto interval calculation more accurate

public/app/core/utils/kbn.js

@@ -12,39 +12,66 @@ function($, _) {
 
   kbn.round_interval = function(interval) {
     switch (true) {
-    // 0.5s
-    case (interval <= 500):
+    // 0.3s
+    case (interval <= 300):
       return 100;       // 0.1s
-    // 5s
-    case (interval <= 5000):
+    // 0.75s
+    case (interval <= 750):
+      return 500;       // 0.5s
+    // 1.5s
+    case (interval <= 1500):
       return 1000;      // 1s
+    // 3.5s
+    case (interval <= 3500):
+      return 2000;      // 2s
     // 7.5s
     case (interval <= 7500):
       return 5000;      // 5s
-    // 15s
-    case (interval <= 15000):
+    // 12.5s
+    case (interval <= 12500):
       return 10000;     // 10s
+    // 17.5s
+    case (interval <= 17500):
+      return 15000;     // 15s
+    // 25s
+    case (interval <= 25000):
+      return 20000;     // 20s
     // 45s
     case (interval <= 45000):
       return 30000;     // 30s
-    // 3m
-    case (interval <= 180000):
+    // 1.5m
+    case (interval <= 90000):
       return 60000;     // 1m
-    // 9m
+    // 3.5m
+    case (interval <= 210000):
+      return 120000;    // 2m
+    // 7.5m
     case (interval <= 450000):
       return 300000;    // 5m
-    // 20m
-    case (interval <= 1200000):
+    // 12.5m
+    case (interval <= 750000):
       return 600000;    // 10m
+    // 12.5m
+    case (interval <= 1050000):
+      return 900000;    // 15m
+    // 25m
+    case (interval <= 1500000):
+      return 1200000;   // 20m
     // 45m
     case (interval <= 2700000):
       return 1800000;   // 30m
-    // 2h
-    case (interval <= 7200000):
+    // 1.5h
+    case (interval <= 5400000):
       return 3600000;   // 1h
-    // 6h
-    case (interval <= 21600000):
+    // 2.5h
+    case (interval <= 9000000):
+      return 7200000;   // 2h
+    // 4.5h
+    case (interval <= 16200000):
       return 10800000;  // 3h
+    // 9h
+    case (interval <= 32400000):
+      return 21600000;  // 6h
     // 24h
     case (interval <= 86400000):
       return 43200000;  // 12h

public/test/core/utils/kbn_specs.js

@@ -127,7 +127,7 @@ define([
     it('10m 1600 resolution', function() {
       var range = { from: dateMath.parse('now-10m'), to: dateMath.parse('now') };
       var str = kbn.calculateInterval(range, 1600, null);
-      expect(str).to.be('100ms');
+      expect(str).to.be('500ms');
     });
 
     it('fixed user interval', function() {
@@ -145,7 +145,7 @@ define([
     it('large time range and user low limit', function() {
       var range = { from: dateMath.parse('now-14d'), to: dateMath.parse('now') };
       var str = kbn.calculateInterval(range, 1000, '>10s');
-      expect(str).to.be('30m');
+      expect(str).to.be('20m');
     });
   });
 });