performance.

Author: dashed

src/sentry/static/sentry/app/views/organizationEventsV2/transactionView/spanBar.tsx

@@ -24,12 +24,113 @@ import {SPAN_ROW_HEIGHT, SpanRow} from './styles';
 import * as DividerHandlerManager from './dividerHandlerManager';
 import SpanDetail from './spanDetail';
 
-const INTERSECTION_THRESHOLDS: Array<number> = [];
-
-// TODO: hardcode this or use babel macros
-for (let i = 0; i <= 1.0; i += 0.01) {
-  INTERSECTION_THRESHOLDS.push(i);
-}
+// TODO: maybe use babel-plugin-preval
+// for (let i = 0; i <= 1.0; i += 0.01) {
+//   INTERSECTION_THRESHOLDS.push(i);
+// }
+const INTERSECTION_THRESHOLDS: Array<number> = [
+  0,
+  0.01,
+  0.02,
+  0.03,
+  0.04,
+  0.05,
+  0.06,
+  0.07,
+  0.08,
+  0.09,
+  0.1,
+  0.11,
+  0.12,
+  0.13,
+  0.14,
+  0.15,
+  0.16,
+  0.17,
+  0.18,
+  0.19,
+  0.2,
+  0.21,
+  0.22,
+  0.23,
+  0.24,
+  0.25,
+  0.26,
+  0.27,
+  0.28,
+  0.29,
+  0.3,
+  0.31,
+  0.32,
+  0.33,
+  0.34,
+  0.35,
+  0.36,
+  0.37,
+  0.38,
+  0.39,
+  0.4,
+  0.41,
+  0.42,
+  0.43,
+  0.44,
+  0.45,
+  0.46,
+  0.47,
+  0.48,
+  0.49,
+  0.5,
+  0.51,
+  0.52,
+  0.53,
+  0.54,
+  0.55,
+  0.56,
+  0.57,
+  0.58,
+  0.59,
+  0.6,
+  0.61,
+  0.62,
+  0.63,
+  0.64,
+  0.65,
+  0.66,
+  0.67,
+  0.68,
+  0.69,
+  0.7,
+  0.71,
+  0.72,
+  0.73,
+  0.74,
+  0.75,
+  0.76,
+  0.77,
+  0.78,
+  0.79,
+  0.8,
+  0.81,
+  0.82,
+  0.83,
+  0.84,
+  0.85,
+  0.86,
+  0.87,
+  0.88,
+  0.89,
+  0.9,
+  0.91,
+  0.92,
+  0.93,
+  0.94,
+  0.95,
+  0.96,
+  0.97,
+  0.98,
+  0.99,
+  1.0,
+];
 
 type SpanBarProps = {
   trace: Readonly<ParsedTraceType>;