Minor incorrectness of diagram legend

[lucasturci]

Where is the problem?

Section "A page as a Dependency Tree" of Asynchronous Operations Introduction

What is the problem?

The legend is not entirely correct. The block

is true for "Render component A" -> "Fetch A cache misses via cURL", but not for "Fetch A cache misses via cURL" -> "Identify A cache misses". The second dependency is actually backwards, "Identify A cache misses" depends on "Fetch A cache misses via cURL" to have run.

I get the meaning intended, but I would suggest having another arrow type, with a different legend, because this can be a little confusing when comparing this diagram with the others that follow. Also, if other diagrams can be provided with a legend, the page would be brilliant.

Btw, leaving here my appreciation to that page, I think it's very helpful to understand how hack asynchrony works :).

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Please don't change anything below this point.

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• Build ID: HHVM=HHVM-4.164.0:HSL=v4.108.1:2022-08-26T00:00:37+0000:1fa47f258c6b68f8ec01899aa82fd6ffa0957109
• Page requested: /hack/asynchronous-operations/introduction
• Page requested at: Fri, 26 Aug 2022 13:17:27 +0000
• Controller: GuidePageController