FIX Chrome Efficiency Mode Throttling Specific Tabs (2026)

Key takeaways

• Chrome’s Efficiency Mode drops JS timer resolution from 1 ms to 1,000 ms in every background tab. No per-tab override exists.
• Audible tabs and WebRTC connections are auto-exempt. Everything else gets throttled the moment you switch away.
• Four workarounds: disable globally, move to a visible window, play silent audio, or whitelist the domain in a tab suspender.

Your real-time dashboard stops updating when you switch away from it. Your crypto ticker freezes. The music player stutters. Chrome’s Efficiency Mode is throttling those tabs because Chrome has no idea they need to stay active — it treats all background tabs the same. There is no per-tab toggle. Here are the workarounds available in Chrome 146 when you need specific tabs to stay fully active.

Quick Diagnosis

Option 1: Turn Off Efficiency Mode Globally

This is the simplest option if you are plugged in or have a high-end machine where power savings are not critical.

1. Go to chrome://settings/performance
2. Find Energy Saver
3. Toggle it off

Drawback: you lose CPU throttling benefits across all background tabs, increasing power consumption and heat.

Option 2: Use a Separate Window for Critical Tabs

Chrome’s throttling heuristic is based on tab visibility, not window visibility. A tab in a separate, visible window is less likely to be throttled because its rendering context remains active.

1. Right-click the tab you want to protect
2. Select Move tab to new window
3. Position the new window so it remains at least partially visible on screen

This is unreliable — Chrome may still throttle background frames within the visible window.

Option 3: The Silent Audio Trick

Chrome exempts audible tabs from Efficiency Mode — if a tab is playing audio, Chrome treats it as active and does not throttle it. Some dashboards embed a silent audio loop to stay exempt.

This is a hack, not a supported feature. Chrome may close it in future versions. It also puts a speaker icon on the tab, which looks odd. Use it as a last resort.

Option 4: Use SuperchargePerformance’s Per-Domain Whitelist

Note that SuperchargePerformance controls tab suspension (whether a tab is discarded), not Chrome’s Efficiency Mode throttling directly. These are different mechanisms — suspension removes the tab from memory entirely, while throttling reduces its timer resolution. For tabs that need to keep running background code without being suspended, the whitelist is the right tool:

1. Install SuperchargePerformance from the Chrome Web Store
2. Navigate to the tab you want to protect (your dashboard, ticker, or music player)
3. Click the SuperchargePerformance icon in the toolbar
4. Toggle Whitelist this site — the domain is added to the never-suspend list
5. That domain will never be suspended across any tab, now or in future sessions

This leaves Efficiency Mode enabled for all your idle tabs while ensuring the tabs that matter stay fully loaded. It does not disable Efficiency Mode’s timer throttling for whitelisted tabs — for that, Options 1–3 are your only paths.

Comparison: Chrome Controls vs SuperchargePerformance

Technical Background

Chrome’s throttling heuristic classifies tabs as “hidden” or “visible” based on their rendering state. Hidden tabs have their JavaScript timer resolution reduced from 1 ms to 1,000 ms (1-second minimum). This breaks any code that relies on frequent background updates — requestAnimationFrame, setInterval, setTimeout, and background fetch intervals are all affected.

Chrome automatically exempts a few categories from throttling:

• Tabs playing audio (tab.audible = true)
• Tabs with active WebRTC connections (video/voice calls)
• Tabs pinned to the tab bar (in some Chrome versions — behavior varies)

Everything else is subject to throttling when Efficiency Mode is on. There is no API for extensions to signal “this tab should not be throttled” directly. The workarounds above are approximations.

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