Mobile Budget Optimizer
Chrome 143 made mobile eager speculation smarter — it now respects device constraints. This optimizer generates a tuned speculationrules JSON blob for your URL list based on device profile.
Step 1 — Device Profile
Low-end Android
2G/3G · 1 GB RAM
Network: ~1 Mbps
Mid-range
4G · 3 GB RAM
Network: ~15 Mbps
High-end
5G · 8 GB RAM
Network: ~100 Mbps
Recommended budget for selected profile
| Parameter | Value |
|---|---|
| Max concurrent prefetches | 2 |
| Max concurrent prerenders | 0 |
| Bandwidth threshold | < 1 Mbps |
| Eager candidates | Top 2 |
| Moderate candidates | Next 3 |
| Conservative candidates | Remaining |
Step 2 — URL List
Enter up to 10 page URLs and their estimated sizes. Order by priority (most likely to be navigated first).
Page URL
Est. size (KB)