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-rw-r--r--man/ruby.111
1 files changed, 11 insertions, 0 deletions
diff --git a/man/ruby.1 b/man/ruby.1
index b1b8e42401..b058acab97 100644
--- a/man/ruby.1
+++ b/man/ruby.1
@@ -776,6 +776,17 @@ a program (or script) that is to be executed.
.Pp
The pipe template is split on spaces into an argument list before the
template parameters are expanded.
+.Sh MISC ENVIRONMENT
+.Pp
+.Bl -hang -compact -width "RUBY_TCP_NO_FAST_FALLBACK"
+.It Ev RUBY_TCP_NO_FAST_FALLBACK
+If set to
+.Li 1 ,
+disables the fast fallback feature by default in TCPSocket.new and Socket.tcp.
+When set to
+.Li 0
+or left unset, the fast fallback feature is enabled.
+Introduced in Ruby 3.4, default: unset.
.Sh SEE ALSO
.Bl -hang -compact -width "https://www.ruby-toolbox.com/"
.It Lk https://www.ruby-lang.org/