What's new in .NET 11 runtime
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Microsoft’s .NET 11 runtime, updated in release candidate 2, raises minimum hardware requirements by moving x86/x64 baselines from x86-64-v1 to x86-64-v2 across Apple, Linux and Windows, while Windows Arm64 now requires the LSE instruction set. ReadyToRun targets are also raised, to x86-64-v3 on Windows and Linux and to armv8.2-a plus RCPC on Windows Arm64, though Apple targets and Linux’s armv8.0-a JIT/AOT floor are unchanged. The shift drops hardware that lacks instruction sets such as SSE4.2, POPCNT and CX16, meaning .NET 11 will fail to start on older CPUs and may print a message that the processor is missing baseline instruction sets. It matters because the change aligns .NET with Windows 11 and Windows 10-supported silicon and lets ReadyToRun code exploit newer capabilities, but applications may see extra startup overhead where supported hardware falls short of the new compilation targets. What to watch next is how much jitting overhead affected workloads report on older-but-supported machines and whether enterprises accelerate hardware refreshes ahead of .NET 11’s rollout.
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Named in this story
.NET 11, Microsoft (MSFT), Arm (ARM), Apple (AAPL), Raspberry Pi
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