**Concurrency testing** is a type of software testing that checks the performance of software when multiple users are logged in and perform actions simultaneously. Hence, it is also referred to as **multi-user testing**. 

Concurrency testing is challenging to conduct compared to sequential testing, due to the following three problems:

* synchronization problems

* non-determinism 

* time-related defects difficult to detect

Concurrency testing mainly monitors the system for deadlocking, locking, and single-threaded code. 

# Concurrent testing methods 
Some common methods for performing concurrency testing include the following: 

* **Fuzz Test**: The tester inserts incorrect random data and monitors the system's response. 

* **Random Test**: Multiple strands are tested simultaneously by randomizing the test inputs.

* **Code Review**: The testers verify the code and its structures. 

* **Static Analysis**: The tester checks the coding system before the code's execution. 

# Advantages
Some benefits of concurrency testing include the following:

# Disadvantages
Some drawbacks of concurrency testing include the following:

What is concurrency testing?

Concurrency testing is a type of software testing that checks the performance of software when multiple users are logged in and perform actions simultaneously. Hence, it is also referred to as multi-user testing. Concurrency testing is challenging to conduct compared to sequential testing, due to the following three problems:   synchronization problems   non-determinism   time-related defects difficult to detect   Concurrency testing mainly monitors the system for deadlocking, locking, and single-threaded code. 