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@@ -46,7 +46,7 @@ so they are not interrupted by frame drops on the JavaScript thread.
anyways.</a>)</p><p>Similarly, you can happily scroll up and down through a ScrollView when
the JavaScript thread is locked up because the ScrollView lives on the
main thread (the scroll events are dispatched to the JS thread though,
but their receipt is not necessary for the scroll to occur).</p><h3><a class="anchor" name="common-sources-of-performance-problems"></a>Common sources of performance problems <a class="hash-link" href="docs/performance.html#common-sources-of-performance-problems">#</a></h3><h4><a class="anchor" name="development-mode-dev-true"></a>Development mode (dev=true) <a class="hash-link" href="docs/performance.html#development-mode-dev-true">#</a></h4><p>JavaScript thread performance suffers greatly when running in dev mode.
but their receipt is not necessary for the scroll to occur).</p><h3><a class="anchor" name="common-sources-of-performance-problems"></a>Common sources of performance problems <a class="hash-link" href="docs/performance.html#common-sources-of-performance-problems">#</a></h3><h4><a class="anchor" name="console-log-statements"></a>Console.log statements <a class="hash-link" href="docs/performance.html#console-log-statements">#</a></h4><p>When running a bundled app, these statements can cause a big bottleneck in the JavaScript thread. This includes calls from debugging libraries such as <a href="https://github.com/evgenyrodionov/redux-logger" target="_blank">redux-logger</a>, so make sure to remove them before bundling.</p><h4><a class="anchor" name="development-mode-dev-true"></a>Development mode (dev=true) <a class="hash-link" href="docs/performance.html#development-mode-dev-true">#</a></h4><p>JavaScript thread performance suffers greatly when running in dev mode.
This is unavoidable: a lot more work needs to be done at runtime to
provide you with good warnings and error messages, such as validating
propTypes and various other assertions.</p><h4><a class="anchor" name="slow-navigator-transitions"></a>Slow navigator transitions <a class="hash-link" href="docs/performance.html#slow-navigator-transitions">#</a></h4><p>As mentioned above, <code>Navigator</code> animations are controlled by the