diff --git a/tests/benchmarks/README.md b/tests/benchmarks/README.md
index 95d85b1c0..6039363d3 100644
--- a/tests/benchmarks/README.md
+++ b/tests/benchmarks/README.md
@@ -65,3 +65,5 @@ cmake ../llvm \
 ninja -j 8
 # tool `llvm-profdata` is generated under this folder.
 ```
+
+> **Note**: The example above shows `-DLLVM_CCACHE_BUILD:BOOL=ON` for enabling ccache in the cmake configuration. When using the `build_llvm.py` script, ccache is disabled by default to reduce CI storage consumption. To enable it with the script, use: `python3 build_llvm.py --use-ccache --arch X86`