allocate tail with a size in transient vector

lucaong · Feb 8, 2016 · 70b6a12 · 70b6a12
1 parent 97cc058
commit 70b6a12
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/src/immutable/vector.cr b/src/immutable/vector.cr
@@ -543,7 +543,7 @@ module Immutable
 
       def initialize
         @trie = Trie(T).empty(object_id)
-        @tail = [] of T
+        @tail = Array(T).new(Trie::BLOCK_SIZE)
       end
 
       def initialize(elems : Array(T))
@@ -561,7 +561,7 @@ module Immutable
         @tail << elem
         if @tail.size == Trie::BLOCK_SIZE
           @trie = @trie.push_leaf!(@tail, object_id)
-          @tail = [] of T
+          @tail = Array(T).new(Trie::BLOCK_SIZE)
         end
         self
       end