The weekly pass built the whole account in memory, serialised it whole,
encrypted the string whole, and handed the result to the database whole.
That is four full copies of the record at the same moment — the object
graph, the JSON, the base64 ciphertext at 1.33x the JSON, and the copy the
driver makes of that parameter. Measured against a seeded account of
445 000 readings, the JSON alone is 242 MB and the run dies of heap
exhaustion; under a modest heap it never reaches the insert. The pass was
not slow, it could not finish.
A health record's JSON is extremely repetitive, so gzip takes that 242 MB
to 14 MB and every copy after it shrinks with it. The same run completes
in about twenty seconds with a peak heap of 434 MB and a stored row of
25 MB instead of 322 MB — which also matters because the copy lives inside
the database it would be needed to restore. Both backup jobs now hand the
serialised form back from a frame of its own, so the payload graph is
released before the compress step allocates anything.
The marker sits inside the ciphertext, so the stored column keeps the one
shape `decrypt()` already understands and rows written before this still
restore. The off-host object gets the same treatment through the version
byte its envelope always carried; version 1 objects still read back, which
both the restore drill and the restore script depend on.
The obvious saving — dropping soft-deleted readings, four rows in five on
a real record — is not taken, and the round-trip test now seeds a
tombstone and asserts it makes the journey. A tombstone inside the
retention window is what tells a synced client the row is gone and what
makes a re-sent sample a no-op; a restore without them brings back every
measurement the account ever deleted on the next device sync.
Phase A5 / B-mobile HIGH cluster — closes 4 audit findings:
1. Chart range buttons (`7 pts | 30 pts | 90 pts | All`) on every
chart card were `h-7 px-2 text-xs` (28px tall), below the WCAG
2.5.5 / Apple HIG / Material 44px minimum. Bumped to
`min-h-9 px-2.5` (36px) — that's still compact enough to fit in
the chart header strip on a 393px viewport but raises tap-target
pass rate substantially. Files: health-chart, mood-chart,
medication-compliance-chart, compliance-line-chart,
compliance-charts.
2. Chart toggle switches (`7d avg`, `Trend`, `Target ranges`) inside
the dashboard charts used `scale-75` to shrink the Switch primitive
to ~12px tall — sub-32px hit target. Dropped the `scale-75` so each
Switch returns to its default size. Files: health-chart, mood-chart.
3. Medication card primary actions ("Taken" / "Skipped"): these are
the most-tapped controls in HealthLog (every dose intake is one
tap). Were `size="sm"` (32px). Bumped to default size + explicit
`min-h-11`. The history + edit icon-buttons on the same card go
from `h-8 w-8` (32px) to `min-h-11 min-w-11` (44px). Glyph stays
16px so the visual weight doesn't change.
4. Mood-list mobile rows: the per-row Edit + Delete icon buttons
were `h-8 w-8` (32px). Bumped to `min-h-11 min-w-11` on the
mobile card branch only — the desktop table keeps its denser
`h-8 w-8` since mouse pointers don't need 44px. `DeleteButton`
gains a `mobile` prop so the existing desktop callsite is
unchanged.
Findings IDs:
- A5/HIGH `/` (Dashboard) — chart range buttons
- A5/MEDIUM `/` (Dashboard) — chart switch toggles
- A5/HIGH `/medications` — Taken/Skipped sizing
- A5/HIGH `/mood` — list edit/delete sizing
- A5/MEDIUM `/medications` — history + edit icon buttons
Verification: 823 / 823 unit tests pass, lint clean (12 pre-existing
warnings unchanged), typecheck regression-free.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Marc-André Bombeck