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Update performance.md

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@ -156,7 +156,7 @@ On Intel and AMD Windows platforms, Microsoft Visual Studio enables programmers
When compiling with Visual Studio, we recommend the flags `/Ob2 /O2` or better. We do not recommend that you compile simdjson with architecture-specific flags such as `arch:AVX2`. The simdjson library automatically selects the best execution kernel at runtime.
Recent versions of Microsoft Visual Studio on Windows provides support for the LLVM Clang compiler. You only need to install the "Clang compiler" optional component (ClangCL). You may also get a copy of the 64-bit LLVM CLang compiler for [Windows directly from LLVM](https://releases.llvm.org/download.html). The simdjson library fully supports the LLVM Clang compiler under Windows. In fact, you may get better performance out of simdjson with the LLVM Clang compiler than with the regular Visual Studio compiler. And [the Clang compiler is binary compatible with Visual Studio](Meanwhile [clangcl is binary compatible with visual studio](https://clang.llvm.org/docs/MSVCCompatibility.html) which means that you can mix them.
Recent versions of Microsoft Visual Studio on Windows provides support for the LLVM Clang compiler. You only need to install the "Clang compiler" optional component (ClangCL). You may also get a copy of the 64-bit LLVM CLang compiler for [Windows directly from LLVM](https://releases.llvm.org/download.html). The simdjson library fully supports the LLVM Clang compiler under Windows. In fact, you may get better performance out of simdjson with the LLVM Clang compiler than with the regular Visual Studio compiler. Meanwhile [clangcl is binary compatible with visual studio](https://clang.llvm.org/docs/MSVCCompatibility.html) which means that you can mix them.
Under Windows, we also support the GNU GCC compiler via MSYS2. The performance is excellent.