Un peu de lecture pour la plage

32-bit Java [2025]

| Aspect | Details | |--------|---------| | Max theoretical heap | 4 GB (32-bit address space limit) | | Practical heap limit | Windows: 1.2–1.5 GB (OS overhead + DLLs) Linux/macOS: 2.5–3.8 GB | | Object pointer size | 4 bytes (vs 8 bytes in 64-bit) | | Memory footprint | 30–40% smaller for same app | | Register width | 32-bit | | JIT compiler | Tiered compilation, same as 64-bit but with fewer optimizations |

If you are maintaining a 32-bit Java application, here are the pitfalls you'll eventually face: 32-bit java