v149 · JavaScript · Performance
Bytecode Savings Calculator
V8 spends measurable time parsing and compiling inline scripts on every page load. With the Chrome 149 bytecode cache, warm loads skip this work entirely. Enter your script's size and page-load characteristics to estimate the savings.
Parameters
Presets:
Inline script size
KB
Daily page loads
k/day
Repeat visit rate
%
Device speed
Results
Cold compile time
—
first visit / cache miss
Warm load time
—
cache hit (Chrome 149+)
Time saved / warm load
—
per page load
Daily total saved
—
across all warm visits
Parse + compile time breakdown per page load
Cold (no cache)
—
Warm (cached)
—
Configure parameters above to see results.
see also
- Cold vs Warm — live load time comparison
- Cache Key Probe — SHA-256 cache keying
- Size Threshold Explorer — eligibility checker
implementation reference
Need the exact API surface, compatibility boundaries, errors, lifecycle, and source links? Read the matching gendn reference ↗