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to seven times on every launch. "Its so slow to load … I'm using the apk. Compared to Minibits or something its way slower" (a user, 2026-11-05): profiled on Adam's Pixel 9 over DevTools, a launch kept the main thread pegged for ~1.7 s, and 1.4 s of it was loadArkState — every arkStateNow() during the first render (balance, history, notices, the Spending figures) structured-cloned the stored state, ~1 MB on a wallet with deep coins, ~220 ms per copy, before the manager connected and its live state took over. ArkStore.peek() hands back the stored object itself (before the store opens, or on localStorage, the parse is kept until the key is next written); wallet.peekArkState() is loadArkState through it, with the misfiled-state repair still going through loadArkState and each object's owner decoded once; arkStateNow and arkWanted read through it — read-only, as they already were with the live ark.state. Same boot on the phone, live tab with the local build: main-thread busy over the first 4 s 3.7 s → 1.8 s, no pegged stretch. tools/ark-store-test.js: peek returns the same object, sees writes at once, and drops a kept localStorage parse on write
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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localStorage held a deep wallet's ark state as ~700KB of JSON (UTF-16 on
disk), parsed on every boot and stringified on every save, and the wallet
cache blob carried a second ~600KB copy. src/ark/store.js keeps the state
in IndexedDB (db coinos-ark) with each coin's signed bytes as a Uint8Array,
fronted by an in-memory map so loadArkState/saveArkState stay synchronous:
reads return clones, writes coalesce (200ms) and flush immediately when the
page hides. Existing localStorage copies migrate on first open (newest _rev
wins) and are removed only after the IndexedDB write completed; no
IndexedDB means localStorage exactly as before. Records keep their
btc-wallet-cache:<id>:ark… keys, and a wallet wipe clears both stores via
the new per-feature wipeCache hook.
The ark cache extension is now syncOnly: it still rides the sync snapshot
(and the Blossom blob) but the local wallet cache no longer embeds it —
measured on a live wallet the cache blob went from 655KB to 10KB.
Verified in the live tab: all wallets migrated, bytes raw on disk, balance
and coin set unchanged, localStorage ark keys gone. tools/ark-store-test.js
covers migration by _rev, clone-on-read, write-behind, wipe and fallback.
Co-Authored-By: Claude Fable 5.1 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Nw1Dijik1tLVKRM1WkU7xE
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