perf(bench): downsample time series charts with LTTB#2831
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ECharts becomes sluggish rendering 100k+ data points, common with multi-series 10-minute benchmarks at 10ms sampling. LTTB (Largest-Triangle-Three-Buckets) reduces each series to 3000 points at the chart boundary while preserving visual shape -- peaks, valleys, and trends. Full-resolution data remains in report.json; only the charming conversion path is downsampled. The latency distribution chart (50 pre-computed bins) is unaffected.
mmodzelewski
approved these changes
Feb 27, 2026
Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## master #2831 +/- ##
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+ Coverage 67.58% 67.64% +0.06%
Complexity 708 708
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Files 1027 1030 +3
Lines 83147 83846 +699
Branches 60004 60712 +708
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+ Hits 56195 56718 +523
- Misses 24612 24771 +159
- Partials 2340 2357 +17
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krishvishal
approved these changes
Feb 27, 2026
spetz
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Feb 27, 2026
kriti-sc
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Mar 6, 2026
ECharts becomes sluggish rendering 100k+ data points, common with multi-series 10-minute benchmarks at 10ms sampling. LTTB (Largest-Triangle-Three-Buckets) reduces each series to 3000 points at the chart boundary while preserving visual shape -- peaks, valleys, and trends. Full-resolution data remains in report.json; only the charming conversion path is downsampled. The latency distribution chart (50 pre-computed bins) is unaffected.
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ECharts becomes sluggish rendering 100k+ data points,
common with multi-series 10-minute benchmarks at 10ms
sampling. LTTB (Largest-Triangle-Three-Buckets) reduces
each series to 3000 points at the chart boundary while
preserving visual shape -- peaks, valleys, and trends.
Full-resolution data remains in report.json; only the
charming conversion path is downsampled. The latency
distribution chart (50 pre-computed bins) is unaffected.