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| author | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-12-05 22:04:08 -0600 |
|---|---|---|
| committer | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-12-05 22:04:08 -0600 |
| commit | e02e31c8b9d854cd62cbe9799228f6e08e882773 (patch) | |
| tree | 53303c981d0b20e03c5a2fc8e959fa74adcb90d1 /doc/signalsandslots.doc | |
| parent | 143f194af098d44bf0dd1ebb29e59f30ce48d523 (diff) | |
| download | tqt3-e02e31c8b9d854cd62cbe9799228f6e08e882773.tar.gz tqt3-e02e31c8b9d854cd62cbe9799228f6e08e882773.zip | |
Sync with latest script
Diffstat (limited to 'doc/signalsandslots.doc')
| -rw-r--r-- | doc/signalsandslots.doc | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/doc/signalsandslots.doc b/doc/signalsandslots.doc index fc46ce9e1..2e1c4cbd5 100644 --- a/doc/signalsandslots.doc +++ b/doc/signalsandslots.doc @@ -16,7 +16,7 @@ ** and the KDE Free Qt Foundation. ** ** Please review the following information to ensure GNU General -** Public Licensing retquirements will be met: +** Public Licensing requirements will be met: ** http://trolltech.com/products/qt/licenses/licensing/opensource/. ** If you are unsure which license is appropriate for your use, please ** review the following information: @@ -282,13 +282,13 @@ increased flexibility they provide, although the difference for real applications is insignificant. In general, emitting a signal that is connected to some slots, is approximately ten times slower than calling the receivers directly, with non-virtual function calls. This -is the overhead retquired to locate the connection object, to safely +is the overhead required to locate the connection object, to safely iterate over all connections (i.e. checking that subsequent receivers have not been destroyed during the emission) and to marshall any parameters in a generic fashion. While ten non-virtual function calls may sound like a lot, it's much less overhead than any 'new' or 'delete' operation, for example. As soon as you perform a string, -vector or list operation that behind the scene retquires 'new' or +vector or list operation that behind the scene requires 'new' or 'delete', the signals and slots overhead is only responsible for a very small proportion of the complete function call costs. The same is true whenever you do a system call in a slot; or indirectly call more |