Real web performance optimizer (no prefetch): freeze below-the-fold, lazy-mount heavy widgets, third-party quarantine, yielding helpers.
HyperTurbo speeds up real-world sites (especially e-commerce) without prefetch.
Instead of fetching pages early, it reduces main-thread work and rendering cost:
- ✅ Freeze below-the-fold sections using content-visibility + contain-intrinsic-size
- ✅ Lazy-mount heavy widgets when they become visible (reviews, instagram feeds, maps, etc.)
- ✅ Third-party quarantine (opt-in): delay heavy external scripts until interaction / after LCP / timeout
- ✅ Yielding helpers (opt-in): split long loops into chunks to reduce TBT/INP
- ✅ Long-task observer (diagnostics): detect runtime long tasks and show suggestions (debug)
> Safe-by-default: you can enable features gradually.
---
html
`$3
bash
npm i hyperturbo
`---
Configuration
js
window.HyperTurbo = {
debug: true, // Freeze below fold
freezeBelowFold: true,
freezeSelector: "main > section, .shopify-section, [data-hyperturbo-freeze]",
freezeRootMargin: "1200px 0px",
containIntrinsicSize: "800px 1000px",
// Lazy mount widgets
lazyMount: true,
lazyMountSelector: "[data-hyperturbo-mount]",
lazyMountRootMargin: "800px 0px",
// Yield helpers
yieldLongTasks: true,
yieldMaxChunkMs: 10,
// Third-party quarantine (OPT-IN)
quarantineThirdParties: false,
thirdPartyMode: "allowlist",
thirdPartyAllow: ["googletagmanager.com", "google-analytics.com"],
thirdPartyRelease: "interaction", // interaction | afterLCP | timeout
thirdPartyTimeoutMs: 2500,
thirdPartyMaxParallel: 1
};
`---
Lazy-mount examples (the magic part)
$3
html
`$3
html
`---
Yielding helpers (reduce long tasks)
js
// Split a long loop into chunks:
HyperTurbo.scheduler.chunkedFor(items.length, (i) => {
heavyWork(items[i]);
}, { chunkMs: 8 });
`---
API
After load,
becomes the library instance (UMD):-
HyperTurbo.version
-
- → postTask, yield, chunkedFor, chunkedWhile
-
- (only if observeLongTasks is enabled)---
Notes / Safety
-
freezeBelowFold uses modern CSS (content-visibility). Unsupported browsers simply benefit less.
- quarantineThirdParties` is OFF by default. Enable it only after testing.---