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Overview
Comment: | Optimization to sqlite3_value_bytes() for the common case that does not require a data transformation. |
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Downloads: | Tarball | ZIP archive | SQL archive |
Timelines: | family | ancestors | descendants | both | trunk |
Files: | files | file ages | folders |
SHA1: |
8d79f3a1443391bee204bb8c49240f44 |
User & Date: | drh 2015-06-25 23:52:48 |
Context
2015-06-26
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02:41 | Simplify the pcache by not keeping continuous track of page 1 but instead just loading page 1 on the rare occasions when it is actually needed. check-in: 015302f1 user: drh tags: trunk | |
2015-06-25
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23:52 | Optimization to sqlite3_value_bytes() for the common case that does not require a data transformation. check-in: 8d79f3a1 user: drh tags: trunk | |
19:53 | Simplifications and performance improvements in insertCell(). check-in: 7d02e6c9 user: drh tags: trunk | |
Changes
Changes to src/vdbemem.c.
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void sqlite3ValueFree(sqlite3_value *v){ if( !v ) return; sqlite3VdbeMemRelease((Mem *)v); sqlite3DbFree(((Mem*)v)->db, v); } /* ** Return the number of bytes in the sqlite3_value object assuming ** that it uses the encoding "enc" */ int sqlite3ValueBytes(sqlite3_value *pVal, u8 enc){ Mem *p = (Mem*)pVal; if( (p->flags & MEM_Blob)!=0 || sqlite3ValueText(pVal, enc) ){ if( p->flags & MEM_Zero ){ return p->n + p->u.nZero; }else{ return p->n; } } return 0; } |
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void sqlite3ValueFree(sqlite3_value *v){ if( !v ) return; sqlite3VdbeMemRelease((Mem *)v); sqlite3DbFree(((Mem*)v)->db, v); } /* ** The sqlite3ValueBytes() routine returns the number of bytes in the ** sqlite3_value object assuming that it uses the encoding "enc". ** The valueBytes() routine is a helper function. */ static SQLITE_NOINLINE int valueBytes(sqlite3_value *pVal, u8 enc){ return valueToText(pVal, enc)!=0 ? pVal->n : 0; } int sqlite3ValueBytes(sqlite3_value *pVal, u8 enc){ Mem *p = (Mem*)pVal; assert( (p->flags & MEM_Null)==0 || (p->flags & (MEM_Str|MEM_Blob))==0 ); if( (p->flags & MEM_Str)!=0 && pVal->enc==enc ){ return p->n; } if( (p->flags & MEM_Blob)!=0 ){ if( p->flags & MEM_Zero ){ return p->n + p->u.nZero; }else{ return p->n; } } if( p->flags & MEM_Null ) return 0; return valueBytes(pVal, enc); } |