Opera:flags Experiments _best_ May 2026

Under the Hood: An Experimental Analysis of Feature Flags and Performance Tuning via opera:flags

GPU rasterization significantly improves graphics-heavy benchmarks but nearly doubles GPU memory. No JavaScript performance regression. 4.2 Parallel Downloading ( #enable-parallel-downloading ) | Metric | Enabled (default) | Disabled | Δ | | --- | --- | --- | --- | | 100MB download time (sec) | 1.82 (±0.09) | 2.97 (±0.12) | +63% slower when disabled | | CPU during download (%) | 12% | 4% | -66% CPU when disabled | | Max TCP connections | 4 | 1 | N/A | opera:flags experiments

Crash incidence (zero-copy rasterizer)