Gleam v1.19.0 introduces a rewritten Erlang code generator that outputs Erlang abstract forms instead of source code. This change improves compiler performance, reduces build times, and provides accurate location metadata for crash reports and stack traces. The new design also enhances code quality and aligns with modern standards.
Benchmarks based on José Valim's langcompilebench show significant speed improvements over previous versions. Gleam compiles faster than many popular languages, including Erlang, Elixir, and Java, when targeting the Erlang virtual machine. The update also includes JavaScript compilation benchmarks for broader comparison.
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