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-rw-r--r--doc/contributing/building_ruby.md2
1 files changed, 2 insertions, 0 deletions
diff --git a/doc/contributing/building_ruby.md b/doc/contributing/building_ruby.md
index b96fa4bc0b..4f76d15804 100644
--- 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