Watson dd7ed00ec4 Use strip & empty? to detect Whitespaces ...

## Test code
```ruby
require 'benchmark/ips'

WhitespaceOrNothing = /\A\s*\z/
token = " " * 20

Benchmark.ips do |x|
  x.report("WhitespaceOrNothing") {
    token =~ WhitespaceOrNothing
  }
  x.report("strip & empty?") {
    token.strip.empty?
  }

  x.compare!
end
```

## Result
```
Warming up --------------------------------------
 WhitespaceOrNothing   266.391k i/100ms
      strip & empty?     1.044M i/100ms
Calculating -------------------------------------
 WhitespaceOrNothing      2.705M (± 0.4%) i/s -     13.586M in   5.023453s
      strip & empty?     10.400M (± 1.1%) i/s -     52.182M in   5.017990s

Comparison:
      strip & empty?: 10400286.2 i/s
 WhitespaceOrNothing:  2704552.3 i/s - 3.85x  (± 0.00) slower
```

2022-03-12 19:24:56 +09:00

..

liquid

Use strip & empty? to detect Whitespaces

2022-03-12 19:24:56 +09:00

liquid.rb

Eagerly cache global filters

2022-03-01 13:40:40 +01:00