fix: improve balance fetcher perf

[salimtb]

Description

Changelog

CHANGELOG entry:

Related issues

Fixes:

Manual testing steps

1. Go to this page...

Screenshots/Recordings

Before

After

Pre-merge author checklist

• I've followed MetaMask Contributor Docs and MetaMask Extension Coding Standards.
• I've completed the PR template to the best of my ability
• I’ve included tests if applicable
• I’ve documented my code using JSDoc format if applicable
• I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

[github-actions]

CLA Signature Action: All authors have signed the CLA. You may need to manually re-run the blocking PR check if it doesn't pass in a few minutes.

[metamaskbotv2]

✨ Files requiring CODEOWNER review ✨

🔑 @MetaMask/accounts-engineers (1 files, +1 -7)

• 📁 ui/
  • 📁 components/
    • 📁 multichain/
      • 📁 account-overview/
        • 📄 account-overview-tabs.tsx +1 -7

---

👨‍🔧 @MetaMask/core-extension-ux (1 files, +1 -7)

• 📁 ui/
  • 📁 components/
    • 📁 multichain/
      • 📁 account-overview/
        • 📄 account-overview-tabs.tsx +1 -7

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[metamaskbotv2]

Builds ready [45bdb48]

• builds: chrome, firefox
• builds (beta): chrome, firefox
• builds (flask): chrome, firefox
• builds (test): chrome, firefox
• builds (test-flask): chrome, firefox
• bundle size: Bundle Size Stats
• interaction-benchmark: Interaction Stats
• storybook: Storybook
• typescript migration: Dashboard
• all artifacts
• bundle viz:

  • background: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13
  • common: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18
  • ui: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20
  • content-script: 0
  • offscreen: 0

⚡ Performance Benchmarks

👆 Interaction Benchmarks

Benchmark	Metric	Mean (ms)	Min (ms)	Max (ms)	Std Dev (ms)	P75 (ms)	P95 (ms)
Load New Account	load_new_account	361	262	504	108	482	504
	total	361	262	504	108	482	504
Confirm Tx	confirm_tx	6045	6036	6053	6	6048	6053
	total	6045	6036	6053	6	6048	6053
Bridge User Actions	bridge_load_page	213	203	226	9	215	226
	bridge_load_asset_picker	197	192	200	3	198	200
	bridge_search_token	695	693	698	2	696	698
	total	1103	1092	1120	10	1102	1120

🔌 Startup Benchmarks

Benchmark	Metric	Mean (ms)	Min (ms)	Max (ms)	Std Dev (ms)	P75 (ms)	P95 (ms)
Standard Home	uiStartup	1376	1148	1686	109	1444	1551
	load	1157	947	1441	104	1231	1340
	domContentLoaded	1150	929	1435	104	1224	1328
	domInteractive	27	15	95	18	24	70
	firstPaint	178	61	1237	158	210	309
	backgroundConnect	195	177	248	11	200	214
	firstReactRender	17	11	37	4	18	26
	initialActions	1	0	12	1	1	2
	loadScripts	970	757	1260	104	1043	1151
	setupStore	13	7	52	7	14	20
	numNetworkReqs	31	22	96	21	22	91
Power User Home	uiStartup	1714	1373	2392	188	1770	2040
	load	1150	1012	1932	165	1132	1608
	domContentLoaded	1132	1006	1854	154	1115	1585
	domInteractive	37	19	169	26	36	86
	firstPaint	196	74	1616	174	254	431
	backgroundConnect	291	255	377	23	297	329
	firstReactRender	21	14	55	6	22	32
	initialActions	1	0	3	1	1	3
	loadScripts	921	807	1630	152	905	1365
	setupStore	16	8	68	8	16	28
	numNetworkReqs	55	34	148	24	55	118

🧭 User Journey Benchmarks

Benchmark	Metric	Mean (ms)	Min (ms)	Max (ms)	Std Dev (ms)	P75 (ms)	P95 (ms)
Onboarding Import Wallet	importWalletToSocialScreen	219	216	221	2	220	221
	srpButtonToSrpForm	91	89	93	1	92	93
	confirmSrpToPwForm	22	21	22	0	22	22
	pwFormToMetricsScreen	15	15	16	0	15	16
	metricsToWalletReadyScreen	16	16	16	0	16	16
	doneButtonToHomeScreen	831	573	1416	336	1006	1416
	openAccountMenuToAccountListLoaded	7490	6820	8059	485	7852	8059
	total	8868	8597	9078	189	9005	9078
Onboarding New Wallet	createWalletToSocialScreen	222	220	224	1	223	224
	srpButtonToPwForm	110	108	114	2	112	114
	createPwToRecoveryScreen	9	9	9	0	9	9
	skipBackupToMetricsScreen	39	38	40	1	39	40
	agreeButtonToOnboardingSuccess	17	16	17	0	17	17
	doneButtonToAssetList	561	489	699	83	556	699
	total	957	882	1096	84	951	1096
Asset Details	assetClickToPriceChart	37	34	44	4	36	44
	total	37	34	44	4	36	44
Solana Asset Details	assetClickToPriceChart	45	43	48	2	45	48
	total	45	43	48	2	45	48
Import Srp Home	loginToHomeScreen	2093	1890	2357	168	2199	2357
	openAccountMenuAfterLogin	41	38	43	2	41	43
	homeAfterImportWithNewWallet	2289	2208	2391	68	2304	2391
	total	4646	4247	5324	382	4787	5324
Send Transactions	openSendPageFromHome	24	12	36	10	35	36
	selectTokenToSendFormLoaded	21	19	22	1	21	22
	reviewTransactionToConfirmationPage	854	849	864	6	855	864
	total	904	903	905	1	905	905
Swap	openSwapPageFromHome	94	87	100	5	96	100
	fetchAndDisplaySwapQuotes	4655	4592	4731	61	4728	4731
	total	4756	4679	4830	63	4824	4830

🌐 Dapp Page Load Benchmarks

Current Commit: 45bdb48 | Date: 3/1/2026

📄 Localhost MetaMask Test Dapp

Samples: 100

Summary

• pageLoadTime-> current mean value: 1.05s (±41ms) 🟡 | historical mean value: 1.05s ⬇️ (historical data)
• domContentLoaded-> current mean value: 736ms (±39ms) 🟢 | historical mean value: 739ms ⬇️ (historical data)
• firstContentfulPaint-> current mean value: 81ms (±11ms) 🟢 | historical mean value: 83ms ⬇️ (historical data)

📈 Detailed Results

Metric	Mean	Std Dev	Min	Max	P95	P99
pageLoadTime	1.05s	41ms	1.02s	1.34s	1.10s	1.34s
domContentLoaded	736ms	39ms	711ms	1.01s	778ms	1.01s
firstPaint	81ms	11ms	64ms	176ms	88ms	176ms
firstContentfulPaint	81ms	11ms	64ms	176ms	88ms	176ms
largestContentfulPaint	0ms	0ms	0ms	0ms	0ms	0ms

Bundle size diffs

• background: 58 Bytes (0%)
• ui: 447 Bytes (0.01%)
• common: 20 Bytes (0%)