Dash vs HHVM (HipHop Virtual Machine): What are the differences?

Developers describe Dash as "Gives your Mac instant offline access to 150+ API documentation sets". Dash is an API Documentation Browser and Code Snippet Manager. Dash stores snippets of code and instantly searches offline documentation sets for 150+ APIs. You can even generate your own docsets or request docsets to be included. On the other hand, HHVM (HipHop Virtual Machine) is detailed as "An open-source virtual machine designed for executing programs written in Hack and PHP". HHVM uses a just-in-time (JIT) compilation approach to achieve superior performance while maintaining the flexibility that PHP developers are accustomed to. To date, HHVM (and its predecessor HPHPc before it) has realized over a 9x increase in web request throughput and over a 5x reduction in memory consumption for Facebook compared with the PHP 5.2 engine + APC.

Dash can be classified as a tool in the "API Documentation Browser" category, while HHVM (HipHop Virtual Machine) is grouped under "Virtual Machine".

"Dozens of API docs and Cheat-Sheets" is the primary reason why developers consider Dash over the competitors, whereas "Very fast" was stated as the key factor in picking HHVM (HipHop Virtual Machine).

HHVM (HipHop Virtual Machine) is an open source tool with 16.1K GitHub stars and 2.85K GitHub forks. Here's a link to HHVM (HipHop Virtual Machine)'s open source repository on GitHub.

Tailor Brands, AgFlow, and Netsells are some of the popular companies that use Dash, whereas HHVM (HipHop Virtual Machine) is used by Facebook, Slack, and Wikipedia. Dash has a broader approval, being mentioned in 24 company stacks & 32 developers stacks; compared to HHVM (HipHop Virtual Machine), which is listed in 32 company stacks and 19 developer stacks.