Package org.antlr.v4.test.runtime.java.api.perf.jmh

Class CharStreamsBenchmark

java.lang.Object
org.antlr.v4.test.runtime.java.api.perf.jmh.CharStreamsBenchmark
Direct Known Subclasses:
CharStreamsBenchmark_jmhType_B1
public class CharStreamsBenchmark extends Object
Measures CharStreams.fromString(String) independently from lexing.

The three data shapes exercise the byte, UTF-16, and code-point backing stores selected by CodePointBuffer. The source-sized input makes allocation and conversion work visible without grammar or DFA effects.

  • Constructor Details

    • CharStreamsBenchmark

      public CharStreamsBenchmark()

  • Method Details

    • from_string

      public void from_string(CharStreamsBenchmark.StringState state, org.openjdk.jmh.infra.Blackhole blackhole)

    • from_char_buffer_array

      public void from_char_buffer_array(CharStreamsBenchmark.CharBufferState state, org.openjdk.jmh.infra.Blackhole blackhole)

    • la_one_then_consume

      public void la_one_then_consume(CharStreamsBenchmark.StringState state, org.openjdk.jmh.infra.Blackhole blackhole)
      Mirrors the dominant lexer access pattern: look ahead one code point, consume it, and restart from the beginning for the next invocation.

    • appendAscii

      private static void appendAscii(StringBuilder builder, int length)

    • appendBmp

      private static void appendBmp(StringBuilder builder, int length)

    • appendSmp

      private static void appendSmp(StringBuilder builder, int length)