Yes, but there can be a lot more complex cases, just wondering if declaring 
variable faster helps v8 to optimize code faster/cheaper.

On Thursday, February 4, 2016 at 10:37:09 AM UTC+2, Jakob Kummerow wrote:
>
> Shouldn't make a difference in most cases. Personally, I'd go for:
>
> 3) var x = value ? 2 : 1;
>
> which, per the JavaScript spec, is semantically equivalent to (1) anyway, 
> but more concise.
>
> On Wed, Feb 3, 2016 at 9:16 PM, Arthur Shefer <[email protected] 
> <javascript:>> wrote:
>
>> Hello, fast question - what is the best approach for v8 when declaring 
>> variables and final value is only known after processing but with known 
>> type?
>>
>> 1) var x; 
>>     x = value ? 2 : 1;
>>
>> 2) var x = 0; 
>>     x = value ? 2 : 1;
>>
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