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What are parallel Streams

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Anjali Sharma answered on December 29, 2022 Popularity 5/10 Helpfulness 1/10

answer What are parallel Streams

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What are parallel Streams

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Parallel Streams can take advantage of MultiCore processors, and get executed in parallel.

But you should take care while using parallel streams

Eg. Fork Join Pool

List<Integer> listOfNumbers = Arrays.asList(1, 2, 3, 4);
int sum = listOfNumbers.parallelStream().reduce(5, Integer::sum);
assertThat(sum).isNotEqualTo(15);

Popularity 5/10 Helpfulness 1/10 Language javascript

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Tags: javascript

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Contributed on Jan 04 2023

Anjali Sharma

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class ParallelStreams {

	public static void main(String[] args) {
		
		long startTime;
		long endTime;
		
		List<Employee> list = new ArrayList<>();
		
		for (int i = 0; i < 100; i++) {
			list.add(new Employee("John", 20000));
			list.add(new Employee("Rohn", 3000));
			list.add(new Employee("Tom", 15000));
			list.add(new Employee("Bheem", 8000));
			list.add(new Employee("Shiva", 200));
			list.add(new Employee("Krishna", 50000));
		} 
		
		
		 startTime = System.currentTimeMillis();
		System.out.println("Performing Sequentially: "+list.stream()
		.filter(e -> e.getSalary()> 1000)
		.count());
		
		 endTime = System.currentTimeMillis();
		
		System.out.println("Time taken with Sequential : "+(endTime - startTime));
		
		 startTime = System.currentTimeMillis();
		System.out.println("Performing parallely: "+list.parallelStream()
		.filter(e -> e.getSalary()> 1000)
		.count());
		
		 endTime = System.currentTimeMillis();
		
		System.out.println("Time taken with parallel : "+(endTime - startTime));
		
		
		
	}
}

Popularity 5/10 Helpfulness 1/10 Language java

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Tags: java

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Contributed on Dec 29 2022

Deepika Sahu

0 Answers Avg Quality 2/10

What are parallel Streams

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