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network applications and pre-fetching

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  • Tom Moog
    Regarding network application: There is a feature called deferred fetch in 1.33 mr20. It delays filling the lookahead buffer until there is demand for a
    Message 1 of 1 , Jan 28, 2000
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      Regarding network application:

      There is a feature called "deferred fetch" in 1.33 mr20.
      It delays filling the lookahead buffer until there is demand
      for a token, rather than keeping the lookahead buffer
      filled. It was added by Volker Simonis. He found that
      the parser and sender would interlock because the lexer
      was prefetching tokens. The parser would block waiting
      for the next buffer to arrive with a token while the previous
      command was still being parsed. The sender wouldn't
      send any new data because it was waiting for the receiving
      process to do something with the previous message.

      The defer fetch feature by Volker Simonis in 1.33mr20
      fixes this.

      Tom Moog
      Polhode, Inc.
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