Change metrics JSON format from list to dict

[hadusam]

Motivation and Context

For our visualization of the benchmark results, it is better to use key/value format for metrics.

Description

Before

{
...
    "metrics": [
        {
            "name": "accuracy",
            "value": 0.0
        },
        {
            "name": "accuracy_top3",
            "value": 0.0
        },
        {
            "name": "accuracy_top5",
            "value": 0.3333333432674408
        }
    ]
}

After

{
...
    "metrics": {
        "accuracy": 0.0,
        "accuracy_top3": 0.0,
        "accuracy_top5": 0.3333333432674408
    }
}

How has this been tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature / Optimization (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.

[bo-code-review-bot]

This PR needs Approvals as follows.

• Ownership Approval for / from iizukak, tkng, ruimashita
• Readability Approval for Python from tkng, tsawada

Please choose reviewers and requet reviews!

Click to see how to approve each reviews

You can approve this PR by triggered comments as follows.

• Approve all reviews requested to you (readability and ownership) and LGTM review
  Approval, LGTM

• Approve all ownership reviews
  Ownership Approval or OA

• Approve all readability reviews
  Readability Approval or RA

• Approve specified review targets

  • Example of Ownership Reviewer of /: Ownership Approval for / or OA for /
  • Example of Readability Reviewer of Python: Readability Approval for Python or RA for Python

• Approve LGTM review
  LGTM

See all trigger comments

Please replace [Target] to review target

• Ownership Approval
  • Ownership Approval for [Target]
  • OA for [Target]
  • Ownership Approval
  • OA
  • Approval
• Readability Approval
  • Readability Approval for [Target]
  • RA for [Target]
  • [Target] Readability Approval
  • [Target] RA
  • Readability Approval
  • RA
  • Approval
• LGTM
  • LGTM
  • lgtm

[suttang]

LGTM

[iizukak]

Ownership Approval

[tsawada]

Readability Approval

[tkng]

/ready

[bo-mergebot]

⏳Merge job is queued...