Recently, I found a strange thing inside the company. My own computer uses IE browser to open the website twice, and IE will definitcely crash.

package com {

import flash.events.SampleDataEvent;

import flash.media.Sound;

import flash.net.URLRequest;

/**

* Set the frame rate of sleep mode when fps is minimized in the browser.

*/

public class KeepFPS {

    private var m_sound:Sound;

    public function KeepFPS() {

        super();

    }

    /**

     * Turn on the FPS that is forced to keep the original settings.

     */

    private function startPlay():void {

        if (m_keeping) {

            return;

        }

        if (m_sound == null) {

            m_sound = new Sound(new URLRequest(""));

        }

        m_sound.play();

        m_sound.close();

        m_sound.addEventListener(SampleDataEvent.SAMPLE_DATA, __sampleDataHandler);

        m_sound.play();

        m_keeping = true;

    }

    private function __sampleDataHandler(event:SampleDataEvent):void {

        event.data.position = event.data.length = 4096 * 4;

    }

    private static var m_instance:KeepFPS;

    /**

     * The following method has been tested, IE open two will definitely crash

     */

    public static function keepAwake():void {

        if (m_instance == null) {

            m_instance = new KeepFPS();

        }

        m_instance.startPlay();

    }

}

}

I found this to be the reason. When I call KeepFPS.keepAwake(), opening two IEs will inevitably lead to a crash.

I changed to the following code and it became normal.

private static var sound:Sound;

    private static function keepAwake2():void {

        sound = new Sound(new URLRequest(""));

        sound.play();

        sound.close();

    }

This code is mainly used to prevent some problems in the game caused by the frame rate reduction when IE is minimized.

I am already the latest version, but it will still crash.

Please check this address: https://tracker.adobe.com/#/view/FP-4198903

I recorded a video.