Merge pull request #528 from yob/optimize-hexstring

Reduce allocations when parsing hex strings
yob · Dec 25, 2023 · 7762166 · 7762166
2 parents ea4370c + 803c1b6
commit 7762166
Showing 1 changed file with 1 addition and 3 deletions.
diff --git a/lib/pdf/reader/parser.rb b/lib/pdf/reader/parser.rb
@@ -173,9 +173,7 @@ def hex_string
 
       # add a missing digit if required, as required by the spec
       str << "0" unless str.size % 2 == 0
-      str.chars.each_slice(2).map { |nibbles|
-        nibbles.join("").hex.chr
-      }.join.force_encoding("binary")
+      [str].pack('H*')
     end
     ################################################################################
     # Reads a PDF String from the buffer and converts it to a Ruby String