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lazy evaluation

Deepika Sahu answered on December 29, 2022 Popularity 9/10 Helpfulness 1/10

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lazy evaluation

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Lazy evaluation is an evaluation strategy which holds the evaluation of an expression until its value is needed.
Lazy Evaluation − Advantages
It allows the language runtime to discard sub-expressions that are not directly linked to the final result of the expression.

It reduces the time complexity of an algorithm by discarding the temporary computations and conditionals.

It allows the programmer to access components of data structures out-of-order after initializing them, as long as they are free from any circular dependencies.

It is best suited for loading data which will be infrequently accessed.

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Contributed on Dec 29 2022

Deepika Sahu

0 Answers Avg Quality 2/10

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Delay computation or object creation until absolutely necessary, especially for expensive operations.

public class Lazy {
    private volatile HeavyResource heavyResource;

    public HeavyResource getHeavyResource() {
        if (heavyResource == null) {
            synchronized (this) {
                if (heavyResource == null) {
                    heavyResource = new HeavyResource(); // Expensive operation
                }
            }
        }
        return heavyResource;
    }
}

https://medium.com/stackademic/optimizing-java-for-low-latency-applications-803e181d0add

Popularity 6/10 Helpfulness 1/10 Language java

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Tags: java

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Contributed on Jan 08 2024

Sumit Rawal

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