Javascript questionmark operator9/27/2023 ![]() For the vast majority of JavaScript code out there, this should be totally fine.īeta Was this translation helpful? Give feedback. pre-allocated arrays that you index into instead of object allocations) then this probably isn't a great fit. If you are in the kind of performance-sensitive code where you are already reaching for fine-grained optimization techniques (e.g. In general, if you are not worried about using other objects, allocations, branching, etc., I wouldn't be worried about using True Myth. It allows reading the value of a property located in a Nested object. ![]() A chain of optional chaining operators compiles to a pretty large amount of output with a high number of branches, which also has significant performance costs – including in how much has to go across the wire! But if you're only targeting browsers which support it natively, that should be that much more efficient. JavaScript question mark dot is called optional chaining operator. Here, it is also complicated by the fact that if you are using something like optional chaining and nullish coalescing, you may be dealing with the compiled output, which could have its own overhead. ![]() ![]() It's an interesting idea, but synthetic benchmarks are often uninformative for things like this (even actively misleading), and real life and real world benchmarks for something like this are really hard to get! ![]()
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