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Further improvements to parser speed by enlarging lookup tables to eliminate

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the need to do range checking on the index prior to lookup.

FossilOrigin-Name: 47d3e091ae49eb7947af5abef9b5b96b16b86d349e51fe0677795649be6db473
This commit is contained in:
drh
2019-08-28 11:31:11 +00:00
parent 2e51716b15
commit 010bdb4c79
4 changed files with 16 additions and 24 deletions
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4
tool/lemon.c
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@ -4506,7 +4506,9 @@ void ReportTable(
*/
if( lemp->has_fallback ){
int mx = lemp->nterminal - 1;
while( mx>0 && lemp->symbols[mx]->fallback==0 ){ mx--; }
/* 2019-08-28: Generate fallback entries for every token to avoid
** having to do a range check on the index */
/* while( mx>0 && lemp->symbols[mx]->fallback==0 ){ mx--; } */
lemp->tablesize += (mx+1)*szCodeType;
for(i=0; i<=mx; i++){
struct symbol *p = lemp->symbols[i];