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In Go, a benchmark function is a special type of function that is used to measure the performance of a program or a specific part of it. It is typically used to test the performance of a function or a piece of code by running it repeatedly for a certain number of times and measuring the time taken for each execution.
Benchmark functions in Go are defined using the “Benchmark” prefix followed by the name of the function to be tested. They should have a single parameter of type *testing.B, which is used to control the execution of the benchmark and to report the results.
During the execution of a benchmark, Go runs the function repeatedly for a default number of iterations, and measures the time taken for each iteration. It then calculates the average time taken per iteration and reports it as the benchmark result.
Practice Questions on benchmark functions in Golang
Here are practice questions on benchmark functions in Go:
Which of the following statements is true about benchmark functions in Go?
A) They are used to measure the performance of a program.
B) They should have a single parameter of type *testing.B.
C) They are defined using the “Test” prefix.
D) They are used to validate the correctness of a program.
Answer: B
How does Go calculate the benchmark result?
A) By measuring the time taken for each iteration and reporting the minimum time.
B) By measuring the time taken for each iteration and reporting the maximum time.
C) By measuring the time taken for each iteration and reporting the average time.
D) By measuring the time taken for each iteration and reporting the total time.
Answer: C
What is the purpose of the *testing.B parameter in a benchmark function?
A) To control the execution of the benchmark.
B) To report the results of the benchmark.
C) To define the function to be tested.
D) To validate the correctness of the function.
Answer: A
Which of the following is the correct way to define a benchmark function in Go?
A) func TestFunction(b *testing.B)
B) func BenchFunction(b *testing.B)
C) func BenchmarkFunction(b *testing.B)
D) func TestBenchmark(b *testing.B)
Answer: C
How many times does Go run a benchmark function by default?
A) 1
B) 5
C) 10
D) 100
Answer: D
