Filter to animation frames before bootstrap sampling

Before we were applying bootstrap population resampling across all frame samples, and filtering out mutation frames at regression time. This could cause some odd results due to for example having only mutation samples in some populations.

This change filters out mutation frames prior to bootstrap to avoid these issues.

Author: Victor Miura

MotionMark/resources/runner/results.js

@@ -254,8 +254,11 @@ class ScoreCalculator {
             experimentResult[Strings.json.measurements.stdev] = timeComplexity.standardDeviation();
             experimentResult[Strings.json.measurements.percent] = timeComplexity.percentage();
 
+            var frameTypeIndex = regressionResult.samples.fieldMap[Strings.json.frameType];
+            var animationSamplesData = regressionResult.samples.data.filter(
+                (sample) => sample[frameTypeIndex] == Strings.json.animationFrameType);
             const bootstrapIterations = this._runData.options[Strings.json.bootstrapIterations];
-            const bootstrapResult = Regression.bootstrap(regressionResult.samples.data, bootstrapIterations, function(resampleData) {
+            const bootstrapResult = Regression.bootstrap(animationSamplesData, bootstrapIterations, function(resampleData) {
                 const complexityIndex = regressionResult.samples.fieldMap[complexityKey];
                 resampleData.sort(function(a, b) {
                     return a[complexityIndex] - b[complexityIndex];