[DOC] configure -C tips

ruby · Oct 20, 2023 · 0061ead · 0061ead
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commit 0061ead
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diff --git a/doc/contributing/building_ruby.md b/doc/contributing/building_ruby.md
@@ -91,6 +91,8 @@
 
     - If you are frequently building Ruby, add the `--disable-install-doc` flag to not build documentation which will speed up the build process.
 
+    - Also `-C` (or `--config-cache`) would reduce time to configure from the next time.
+
 5. Build Ruby:
 
     ``` shell