Changeset 602

Timestamp:

Feb 25, 2010, 12:03:04 AM (15 years ago)

Author:

Dmitry A. Kuminov

Message:

corelib: QFileSystemWatcher: In the fall-back polling watcher, increased the sleep time between checks of all watched files from 1 second to 3 seconds to decrease the CPU load on big sets of watched files. Also, replaced the sleep between checking individual items with the yield call as it doesn't give significant improvement but just causes more CPU cycles to be spent between each check.

File:

• trunk/src/corelib/io/qfilesystemwatcher.cpp (modified) (3 diffs)

trunk/src/corelib/io/qfilesystemwatcher.cpp

@@ -72 +72 @@
 {
     enum {
-        SmallPollingInterval = 50,  // time to wait after checking each watched
-                                    // item, ms
-        BigPollingInterval = 1000,  // time to wait after checking all watched
-                                    // items, ms
+        PollingInterval = 3000, // time to wait after checking all watched items, ms
     };
 
@@ -159 +156 @@
                 emit fileChanged(path, false);
             }
-            waitCond.wait(&mutex, SmallPollingInterval);
+            );
         }
         QMutableHashIterator<QString, FileInfo> dit(directories);
@@ -175 +172 @@
                 emit directoryChanged(path, false);
             }
-            waitCond.wait(&mutex, SmallPollingInterval);
+            );
         }
         if (!startOver && !askedToFinish) {
-            waitCond.wait(&mutex, BigPollingInterval);
+            waitCond.wait(&mutex, PollingInterval);
         }
         if (askedToFinish) {