Performance improvement in sqlite3VarintLen().

FossilOrigin-Name: adf9fefb00ae1dbb07a921c6796cb0a9505c6d19

diff --git a/manifest b/manifest
index b38afd0fc147aa6420203f8eacc37e8093ac1ab7..19e81b185fe75b2d63638995981ff259dcc01ab3 100644 (file)
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Small\ssize\sreduction\sand\sperformance\sincrease\sin\ssqlite3DbMallocSize().
-D 2015-09-01T20:09:33.590
+C Performance\simprovement\sin\ssqlite3VarintLen().
+D 2015-09-01T22:29:07.506
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in f85066ce844a28b671aaeeff320921cd0ce36239
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -398,7 +398,7 @@ F src/treeview.c 46036cbbceada0836833531b2d963edbca3d9cfa
 F src/trigger.c 322f23aad694e8f31d384dcfa386d52a48d3c52f
 F src/update.c adc8b4b2b6fd2cca2e0d2b803e0cf6956aa3a030
 F src/utf.c fc6b889ba0779b7722634cdeaa25f1930d93820c
-F src/util.c bc9dd64b5db544218b871b66243871c202b2781f
+F src/util.c fc612367108b74573c5fd13a85d0a23027f438bd
 F src/vacuum.c 2ddd5cad2a7b9cef7f9e431b8c7771634c6b1701
 F src/vdbe.c 6d85be995bd2308a5aa2a68c7b564c5d4cc1a6fb
 F src/vdbe.h 7a75045d879118b9d3af7e8b3c108f2f27c51473
@@ -1380,7 +1380,7 @@ F tool/vdbe_profile.tcl 67746953071a9f8f2f668b73fe899074e2c6d8c1
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh 48bd54594752d5be3337f12c72f28d2080cb630b
 F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
-P 0bee6583665782fac5d9e82bdf19b6f07e7bd03f
-R 39af4bc3b2575cd9ee7302f5efa55d4c
+P 8a80967f849eed002a701235ed7fb406099d566e
+R f6fa5fc612cf465d55de62b1cff01312
 U drh
-Z 1747b3c93823be844ad623868b80b161
+Z 09ba603411590b2095375d5c2fdf1bdd

diff --git a/manifest.uuid b/manifest.uuid
index e0a76f2e25922fcd20a924cef16cbb618a897685..df0b92fb656805ecb3eee8eaeb3e5351981edae4 100644 (file)
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-8a80967f849eed002a701235ed7fb406099d566e
\ No newline at end of file
+adf9fefb00ae1dbb07a921c6796cb0a9505c6d19
\ No newline at end of file

diff --git a/src/util.c b/src/util.c
index 38072a35cb8d6445bb15a4b9526aa9f0500f53f1..f218bb7941781a69c89f72908314523271efe09d 100644 (file)
--- a/src/util.c
+++ b/src/util.c
@@ -1065,11 +1065,8 @@ u8 sqlite3GetVarint32(const unsigned char *p, u32 *v){
 ** 64-bit integer.
 */
 int sqlite3VarintLen(u64 v){
-  int i = 0;
-  do{
-    i++;
-    v >>= 7;
-  }while( v!=0 && ALWAYS(i<9) );
+  int i;
+  for(i=1; (v >>= 7)!=0; i++){ assert( i<9 ); }
   return i;
 }