Blaze Performance: Nested Reference vs. Passing Data

1

Just curious if anyone has experience/opinions about performance of:

{{#each thing}}
  {{> myTemplate index=@index data1=data1 data2=data2}}
{{/each}}

<template name="myTemplate">
  Here is some data for result #{{index}}: {{data1}}, {{data2}}.
</template>

versus

{{#each thing}}
  {{#let index=@index}}
    {{> myTemplate}}
  {{/let}}
{{/each}}

<template name="myTemplate">
  Here is some data for result #{{../index}}: {{../data1}}, {{../data2}}.
</template>

I guess my real question is – does passing data actually pass it, or just create a reference and what are the implications performance-wise?

2

And just realized that #let doesn’t actually change the data context. Guess this is a moot point for my use case!