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Performance improvement for lexing long strings: increase flex's
YY_READ_BUF_SIZE, which turns out to have nothing to do with buffer size. It's just a totally arbitrary upper limit on how much data myinput() is asked for at one time.
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@ -9,7 +9,7 @@
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*
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*
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*
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*
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* IDENTIFICATION
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/parser/scan.l,v 1.66 2000/03/11 05:14:06 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/parser/scan.l,v 1.67 2000/03/13 01:52:06 tgl Exp $
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*
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*
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*-------------------------------------------------------------------------
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*-------------------------------------------------------------------------
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*/
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*/
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@ -47,6 +47,9 @@ static int myinput(char* buf, int max);
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#undef YY_INPUT
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#undef YY_INPUT
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#define YY_INPUT(buf,result,max) {result = myinput(buf,max);}
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#define YY_INPUT(buf,result,max) {result = myinput(buf,max);}
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/* No reason to constrain amount of data slurped per myinput() call. */
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#define YY_READ_BUF_SIZE 16777216
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#else /* !FLEX_SCANNER */
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#else /* !FLEX_SCANNER */
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#undef input
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#undef input
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