slow rendering of webui

[QuanluZhang]

when using https://github.com/Microsoft/nni/blob/master/examples/trials/mnist/config_pai.yml, and set trialConcurrency to 50, 2 issues were found.

In scope
Issue 1: The rendering becomes very slow.

Out of scope
Issue 2: The update of trial jobs' state has high latency compared to the states from pai's webui. This issue will cover in #592

The original problem is not able to reproduce. We had discussed and would like to fix the problem in 2 aspects:

• reduce the loading actions and frequency
• batch get results

Exit Criteria
Precondition: mock 6000 trial with 100 intermediate results for each (yuge)

[scarlett2018]

Are we still seeing this in v0.6? how slow it is?

[QuanluZhang]

"the update of trial jobs' state has high latency compared to the states from pai's webui" this part will be fixed in v0.7 by @chicm-ms

[scarlett2018]

"the update of trial jobs' state has high latency compared to the states from pai's webui" this part will be fixed in v0.7 by @chicm-ms

Thanks, updating this Issue's scope in the first comment.

[scarlett2018]

Assign to Quanlu to verify whether this is still an issue for the latest build.

[scarlett2018]

@LeonardoWang had verified the issue is no longer reproducible, closing it.

[ultmaster]

Tracked in #1425. Closing it.