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| author | drh <drh@noemail.net> | 2017-01-19 21:20:11 +0000 |
|---|---|---|
| committer | drh <drh@noemail.net> | 2017-01-19 21:20:11 +0000 |
| commit | 8674e49214c8d9a0e23cf46c15d6bd4b74b00c4d (patch) | |
| tree | e5cd2205908cc84db5d5ea1e439ddc17c1401b78 /src | |
| parent | 2f31d0204960ccfae468cef94a0447311b9bb143 (diff) | |
| download | sqlite-8674e49214c8d9a0e23cf46c15d6bd4b74b00c4d.tar.gz sqlite-8674e49214c8d9a0e23cf46c15d6bd4b74b00c4d.zip | |
If compiled with SQLITE_INLINE_MEMCPY, all memcpy() calls are replaced with
in-line code. With that change, cachegrind shows which memcpy() calls
are taking the most time. This is a performance-measurement hack only and
is not for production use.
FossilOrigin-Name: 9ed38521617136223a667988aed40e25797faf84
Diffstat (limited to 'src')
| -rw-r--r-- | src/loadext.c | 1 | ||||
| -rw-r--r-- | src/resolve.c | 2 | ||||
| -rw-r--r-- | src/sqliteInt.h | 12 | ||||
| -rw-r--r-- | src/table.c | 2 |
4 files changed, 12 insertions, 5 deletions
diff --git a/src/loadext.c b/src/loadext.c index 6011fd2bf..3296be60d 100644 --- a/src/loadext.c +++ b/src/loadext.c @@ -18,7 +18,6 @@ #endif #include "sqlite3ext.h" #include "sqliteInt.h" -#include <string.h> #ifndef SQLITE_OMIT_LOAD_EXTENSION /* diff --git a/src/resolve.c b/src/resolve.c index dac73e5fa..7d89b6fec 100644 --- a/src/resolve.c +++ b/src/resolve.c @@ -15,8 +15,6 @@ ** table and column. */ #include "sqliteInt.h" -#include <stdlib.h> -#include <string.h> /* ** Walk the expression tree pExpr and increase the aggregate function diff --git a/src/sqliteInt.h b/src/sqliteInt.h index d5ac957d2..6344cac5f 100644 --- a/src/sqliteInt.h +++ b/src/sqliteInt.h @@ -512,6 +512,18 @@ #include <stddef.h> /* +** Use a macro to replace memcpy() if compiled with SQLITE_INLINE_MEMCPY. +** This allows better measurements of where memcpy() is used when running +** cachegrind. But this macro version of memcpy() is very slow so it +** should not be used in production. This is a performance measurement +** hack only. +*/ +#ifdef SQLITE_INLINE_MEMCPY +# define memcpy(D,S,N) {char*xxd=(char*)(D);const char*xxs=(const char*)(S);\ + int xxn=(N);while(xxn-->0)*(xxd++)=*(xxs++);} +#endif + +/* ** If compiling for a processor that lacks floating point support, ** substitute integer for floating-point */ diff --git a/src/table.c b/src/table.c index a50d83ce6..c79255f99 100644 --- a/src/table.c +++ b/src/table.c @@ -17,8 +17,6 @@ ** if they are not used. */ #include "sqliteInt.h" -#include <stdlib.h> -#include <string.h> #ifndef SQLITE_OMIT_GET_TABLE |