JMeter - Difference between jexl2 and jexl3

Question

What is jexl and why is it faster performing than JavaScript in JMeter? ${__jexl3("${checkResponse}" != "")} this code just runs fine in a while controller of Jmeter while the same is not true with "${checkResponse}" != "" or "${checkResponse}" != "\${checkResponse}".

Answer 1

To find the differences, see Jexl 3 changes list, e.g.

Added the range operator (x .. y)

JMeter allow you to choose either version by calling __jexl2 or __jexl3 functions

Jexl has more features you can use, for example:

Jexl can also create classes and call methods on them:

Systemclass = log.class.forName("java.lang.System");
now = Systemclass.currentTimeMillis();