Reduce allocations in `Gem::BUNDLED_GEMS.warning?`

1 files changed, 5 insertions, 2 deletions

diff --git a/lib/bundled_gems.rb b/lib/bundled_gems.rb
index e49d6fbdcf..50fc31937c 100644
--- a/lib/bundled_gems.rb
+++ b/lib/bundled_gems.rb
@@ -99,11 +99,14 @@ module Gem::BUNDLED_GEMS # :nodoc:
       # and `require "syslog"` to `require "#{ARCHDIR}/syslog.so"`.
       feature.delete_prefix!(ARCHDIR)
       feature.delete_prefix!(LIBDIR)
-      segments = feature.split("/")
+      # 1. A segment for the EXACT mapping and SINCE check
+      # 2. A segment for the SINCE check for dashed names
+      # 3. A segment to check if there's a subfeature
+      segments = feature.split("/", 3)
       name = segments.shift
       name = EXACT[name] || name
       if !SINCE[name]
-        name = [name, segments.shift].join("-")
+        name = "#{name}-#{segments.shift}"
         return unless SINCE[name]
       end
       segments.any?