Issue #14624 has been updated by Earlopain (Earlopain _). Status changed from Open to Closed `nil.to_s` is frozen and returns the same instance since ruby 2.7 ---------------------------------------- Feature #14624: #{nil} allocates a fresh empty string each time https://bugs.ruby-lang.org/issues/14624#change-118048 * Author: bumblingbear (Dillon Welch) * Status: Closed ---------------------------------------- This causes a bunch of unnecessary string allocations in the following scenario: `"#{'rails' unless boolean_condition} is great"`. Each time this line is called when `boolean_condition` is true, it evaluates to `nil` and when `nil` is interpolated into a string it allocates an empty string. Ideally, the behavior of `nil.to_s` would reference a frozen empty string that wouldn't need to be reallocated each time. -- https://bugs.ruby-lang.org/