Russ Cox introduces Go and emphasizes its performance benefits.

• Russ Cox, a Google Go team member, enjoys Go's built-in concurrency, novel type system, and especially its speed.
• He claims that most of his programming builds take well under a second.

Russ demonstrates the swift build process of the math package in Go.

• The math package contains over a thousand lines of Go code in about twenty files.
• The entire math package builds in roughly 200 milliseconds.

Testing the math package, including additional test functions, is quick and efficient.

• The math package tests rebuild the package with additional test functions.
• The testing process completes in well under a second.

The entire Go package tree builds remarkably fast on a single machine.

• The Go package tree includes various libraries and around 120,000 lines of source code.
• It builds the entire package tree in under ten seconds on Russ Cox's laptop.

Russ Cox concludes with the productivity benefits of Go and invites viewers to learn more.

• Fast builds allow for a productive day of programming with Go.
• Russ invites viewers to try Go and directs them to golang.org for information and downloads.