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Overview
Comment:Performance enhancement to the blob-literal tokenizer.
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SHA1: 61aa2031f1c5ae05e31077588a55194a9546262a
User & Date: drh 2011-06-03 21:34:45.326
Context
2011-06-03
23:28
Performance improvements on memory copies inside of btree by moving 2 bytes at a time instead of just 1 byte at a time. (check-in: 897f56a158 user: drh tags: trunk)
21:34
Performance enhancement to the blob-literal tokenizer. (check-in: 61aa2031f1 user: drh tags: trunk)
20:11
Create and use a function especially for adding the ParseSchema opcode. This gives a small reduction in code and a small performance increase. (check-in: 957b2ab67c user: drh tags: trunk)
Changes
Unified Diff Ignore Whitespace Patch
Changes to src/tokenize.c.
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      return i;
    }
#ifndef SQLITE_OMIT_BLOB_LITERAL
    case 'x': case 'X': {
      testcase( z[0]=='x' ); testcase( z[0]=='X' );
      if( z[1]=='\'' ){
        *tokenType = TK_BLOB;
        for(i=2; (c=z[i])!=0 && c!='\''; i++){
          if( !sqlite3Isxdigit(c) ){

            *tokenType = TK_ILLEGAL;

          }
        }
        if( i%2 || !c ) *tokenType = TK_ILLEGAL;
        if( c ) i++;
        return i;
      }
      /* Otherwise fall through to the next case */
    }
#endif
    default: {
      if( !IdChar(*z) ){








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      return i;
    }
#ifndef SQLITE_OMIT_BLOB_LITERAL
    case 'x': case 'X': {
      testcase( z[0]=='x' ); testcase( z[0]=='X' );
      if( z[1]=='\'' ){
        *tokenType = TK_BLOB;

        for(i=2; sqlite3Isxdigit(z[i]); i++){}
        if( z[i]!='\'' || i%2 ){
          *tokenType = TK_ILLEGAL;
          while( z[i] && z[i]!='\'' ){ i++; }
        }


        if( z[i] ) i++;
        return i;
      }
      /* Otherwise fall through to the next case */
    }
#endif
    default: {
      if( !IdChar(*z) ){
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