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A new implementation of sqlite3VdbeMakeLabel() is faster and makes fewer

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memory allocations by deferring memory allocation until 
sqlite3VdbeResolveLabel() is called, at which point the code generator has
a better idea of how big the relocation table needs to be.
The sqlite3VdbeMakeLabel() routine now takes a Parse* parameter instead of
Vdbe*.

FossilOrigin-Name: 4a0929ac76d8aa5dd65eac3b83d6bbf41e505e01d175ca0fb2b19ba02d439415
This commit is contained in:
drh
2018-12-29 02:26:59 +00:00
parent 81f9159b5e
commit ec4ccdbcb1
17 changed files with 112 additions and 104 deletions
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2
src/analyze.c
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@@ -1156,7 +1156,7 @@ static void analyzeOneTable(
addrNextRow = sqlite3VdbeCurrentAddr(v);
if( nColTest>0 ){
int endDistinctTest = sqlite3VdbeMakeLabel(v);
int endDistinctTest = sqlite3VdbeMakeLabel(pParse);
int *aGotoChng; /* Array of jump instruction addresses */
aGotoChng = sqlite3DbMallocRawNN(db, sizeof(int)*nColTest);
if( aGotoChng==0 ) continue;