DynamicSlowMPU:with the first of two bigs boosted

Build 2784 on hf/fix-sublink-accessibility
320px
Reviewing disabled
The baseline is shorter than the new snapshot (320x943 to 320x1014).
Baseline History
Build 2784fd88157
Current build. There are unaccepted changes, so build 2461 is still the baseline.
Build 207681411e8
Accepted by Daniel Clifton.
Build 20551a01a5b
Accepted by Anna Beddow.
Build 1170978edb4
Auto-accepted
Commenting is disabled because there's a newer build on this branch