Linux
Use udev to change latency_timer.
In ubuntu, create a rule for /etc/udev/rules.d for your device. For example, 99-xsens.rules
Create a rule in this file according to your device and set latency_timer. For example, for my device, this is:
KERNEL=="ttyUSB[0-9]*", SUBSYSTEMS=="usb-serial", DRIVERS=="ftdi_sio", ATTR{device/latency_timer}="2"
This causes the device to wait a shorter time before deciding that no more incoming data is entering the buffer. In this case, my device went from waiting 16 ms to waiting 2 ms.
Use udevadm info -a -n /dev/ttyUSB0 , for example, to find out which key-value pairs should match in your rule. There are a few complex things to keep in mind, but finding resources to help with inserts was easy as soon as I knew that udev rules needed to be used.
Here is a good udev rules entry man page. It is old, and the syntax of udev tools has changed, but the concepts are still valid.
Window
On Windows, you use Device Manager->Ports->COM Port->Port Settings->Advanced->Latency Timer .