Bug after clang optimization on android ndk r22b+.

[perminovVS]

In the release build on Android(-O1 -O2 -O3), a large lag periodically occurs for several seconds, after a while it repeats.

Having spent a lot of time localizing the problem, it came down to the methods: CCRakNetSlidingWindow::ShouldSendACKs and CCRakNetUDT::ShouldSendACKs.

	// iphone crashes on comparison between double and int64 http://www.jenkinssoftware.com/forum/index.php?topic=2717.0
	if (rto==(CCTimeType) UNSET_TIME_US)
	{
		// Unknown how long until the remote system will retransmit, so better send right away
		return true;
	}

To solve this, I simply disable optimization for this section.

#pragma clang optimize off
// ----------------------------------------------------------------------------------------------------------------------------
bool ShouldSendACKs(CCTimeType curTime, CCTimeType estimatedTimeToNextTick)
{
	CCTimeType rto = GetSenderRTOForACK();
	(void) estimatedTimeToNextTick;

	// iphone crashes on comparison between double and int64 http://www.jenkinssoftware.com/forum/index.php?topic=2717.0
	if (rto==(CCTimeType) UNSET_TIME_US)
	{
		// Unknown how long until the remote system will retransmit, so better send right away
		return true;
	}

	return curTime >= oldestUnsentAck + SYN;
}
#pragma clang optimize on

The problem is in the versions:
Android NDK r22b, r23, r24, r25, r26, r27

If anyone else is using RakNet on modern platforms, I hope it helped you!
Good luck.