[ruby-core:83047] [Ruby trunk Feature#13943] Use unpack1 instead of unpack(template)[0] in erb.rb

Issue #13943 has been updated by znz (Kazuhiro NISHIYAMA).


Using benchmark_driver gem, `unpack1(template)` is about 1.07x faster than `unpack(template)[0]`.

```
% cat url_encode.yml
prelude: |
  require 'erb'
  str = "Programming Ruby:  The Pragmatic Programmer's Guide"
benchmark: ERB::Util.url_encode(str)
% benchmark_driver url_encode.yml -e ruby-base::$(rbenv root)/versions/git/bin/ruby -e ruby-unpack1::$(rbenv root)/versions/git2/bin/ruby
benchmark results:
Execution time (sec)
name             ruby-base ruby-unpack1
url_encode       1.793    1.665

Speedup ratio: compare with the result of `ruby-base' (greater is better)
name             ruby-unpack1
url_encode       1.077
```

----------------------------------------
Feature #13943: Use unpack1 instead of unpack(template)[0] in erb.rb
https://bugs.ruby-lang.org/issues/13943#change-66970

* Author: znz (Kazuhiro NISHIYAMA)
* Status: Assigned
* Priority: Normal
* Assignee: k0kubun (Takashi Kokubun)
* Target version: 
----------------------------------------
I think `unpack1(template)` is faster than `unpack(template)[0]`.

Attached patch for `lib/erb.rb`.

---Files--------------------------------
erb-unpack1.diff (355 Bytes)


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