Performance problem with simple context test.

[jmatsushita]

While testing for levelgraph/levelgraph-jsonld#47 I traced the source of the issue to a performance problem with expansion with this simple case:

{
  "@context": "https://schema.org/",
  "name": "BigBlueHat"
}

I'm doing a PR in the test-suite now.

[jmatsushita]

Can't reproduce in the CI. Looks like this is a problem in my development environment.
I use OSX 10.12.2 and node v6.9.1

Using nvm I can also reproduce execution times of 3877ms for node v5.12.0 3828ms in v4.4.4 while all the other tests run fine performance wise.

[jmatsushita]

Well I can't reproduce the timeout but actually looking more closely at the CI logs it is very slow just short of triggering a mocha timeout:
node 6

  ✓ #t0079 Test jsonld.js timeout problem (1221ms)

node 5

  ✓ #t0079 Test jsonld.js timeout problem (4225ms)

[dlongley]

Closing as not reproducible. Likely related to loading schema.org context from the net.