Consuming Gherkin: One Byte at a Time
summary
Ragel replaces a slow treetop lexer and implements the Gherkin parser used by Cucumber, producing compact state machines, language outputs for Ruby C and Java, and an evented listener-based lexer that tests with a scan helper and test spy. The real gains are concrete: a 150× slower legacy treetop falls away to a 10–15× speedup in Ruby and another ~10× when moved to C, and the parser proves fast, polyglot, and maintainable.
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chapters (6)
- 0:00Start
- 0:06Platinum Sponsor
- 0:16Consuming Gherkin: One Byte At a Time
- 2:53Some Perfectly Normal Syntax
- 27:23What the Tests Told Us
- 28:49Test Spy Listener
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