Скачать или смотреть javascript switch case vs if else performance

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switch-case and if-else statements are both used in javascript for making decisions and branching the code execution based on different conditions.

switch-case statement:
switch-case statement is more suitable when you have multiple conditions to check against a single variable.
it is easier to read and maintain when you have a large number of conditions.
switch-case statement is generally more efficient than if-else when there are many conditions to check because it uses a jump table for comparison.

if-else statement:
if-else statement is more suitable for handling simple conditions or when you have only a few conditions to check.
it is more flexible than switch-case as it can handle complex conditions and multiple variables in the conditions.
if-else statement evaluates conditions sequentially, which can be less efficient than switch-case when there are many conditions to check.

performance comparison:
in general, switch-case is considered to be more performant than if-else when there are multiple conditions to check against a single variable.
switch-case uses a jump table for comparison, which results in faster execution when there are many conditions.
if-else evaluates conditions sequentially, which can be slower when there are many conditions.

here is a code example showcasing the difference in performance between switch-case and if-else statements:



in this example, the switch-case statement is more suitable and performant for handling multiple conditions compared to if-else statements.

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