TST: np.argsort comparision
 - [ ] closes #17046
 - [ ] tests added / passed
 - [ ] passes ``git diff upstream/master -u -- "*.py" | flake8 --diff``
 - [ ] whatsnew entry

looks good. let's see if this passes. ping on green. # [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/17051?src=pr&el=h1) Report
> Merging [#17051](https://codecov.io/gh/pandas-dev/pandas/pull/17051?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/d884e51909a887119c0558146de31284a4278931?src=pr&el=desc) will **decrease** coverage by `0.02%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/17051/graphs/tree.svg?width=650&height=150&src=pr&token=eZ4WkYLtcO)](https://codecov.io/gh/pandas-dev/pandas/pull/17051?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #17051      +/-   ##
==========================================
- Coverage   91.05%   91.03%   -0.03%     
==========================================
  Files         161      161              
  Lines       49350    49350              
==========================================
- Hits        44936    44926      -10     
- Misses       4414     4424      +10
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `88.81% <ø> (-0.01%)` | :arrow_down: |
| #single | `40.26% <ø> (-0.07%)` | :arrow_down: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/17051?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/io/gbq.py](https://codecov.io/gh/pandas-dev/pandas/pull/17051?src=pr&el=tree#diff-cGFuZGFzL2lvL2dicS5weQ==) | `25% <0%> (-58.34%)` | :arrow_down: |
| [pandas/core/frame.py](https://codecov.io/gh/pandas-dev/pandas/pull/17051?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvZnJhbWUucHk=) | `97.75% <0%> (-0.1%)` | :arrow_down: |
| [pandas/core/indexes/datetimes.py](https://codecov.io/gh/pandas-dev/pandas/pull/17051?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvaW5kZXhlcy9kYXRldGltZXMucHk=) | `95.23% <0%> (-0.1%)` | :arrow_down: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/17051?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/17051?src=pr&el=footer). Last update [d884e51...480d574](https://codecov.io/gh/pandas-dev/pandas/pull/17051?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 # [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/17051?src=pr&el=h1) Report
> Merging [#17051](https://codecov.io/gh/pandas-dev/pandas/pull/17051?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/d884e51909a887119c0558146de31284a4278931?src=pr&el=desc) will **decrease** coverage by `0.02%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/17051/graphs/tree.svg?height=150&token=eZ4WkYLtcO&src=pr&width=650)](https://codecov.io/gh/pandas-dev/pandas/pull/17051?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #17051      +/-   ##
==========================================
- Coverage   91.05%   91.03%   -0.03%     
==========================================
  Files         161      161              
  Lines       49350    49350              
==========================================
- Hits        44936    44926      -10     
- Misses       4414     4424      +10
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `88.81% <ø> (-0.01%)` | :arrow_down: |
| #single | `40.26% <ø> (-0.07%)` | :arrow_down: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/17051?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/io/gbq.py](https://codecov.io/gh/pandas-dev/pandas/pull/17051?src=pr&el=tree#diff-cGFuZGFzL2lvL2dicS5weQ==) | `25% <0%> (-58.34%)` | :arrow_down: |
| [pandas/core/frame.py](https://codecov.io/gh/pandas-dev/pandas/pull/17051?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvZnJhbWUucHk=) | `97.75% <0%> (-0.1%)` | :arrow_down: |
| [pandas/core/indexes/datetimes.py](https://codecov.io/gh/pandas-dev/pandas/pull/17051?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvaW5kZXhlcy9kYXRldGltZXMucHk=) | `95.23% <0%> (-0.1%)` | :arrow_down: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/17051?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/17051?src=pr&el=footer). Last update [d884e51...480d574](https://codecov.io/gh/pandas-dev/pandas/pull/17051?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 # [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/17051?src=pr&el=h1) Report
> Merging [#17051](https://codecov.io/gh/pandas-dev/pandas/pull/17051?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/d884e51909a887119c0558146de31284a4278931?src=pr&el=desc) will **increase** coverage by `0.01%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/17051/graphs/tree.svg?height=150&token=eZ4WkYLtcO&src=pr&width=650)](https://codecov.io/gh/pandas-dev/pandas/pull/17051?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #17051      +/-   ##
==========================================
+ Coverage   91.05%   91.06%   +0.01%     
==========================================
  Files         161      161              
  Lines       49350    49602     +252     
==========================================
+ Hits        44936    45172     +236     
- Misses       4414     4430      +16
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `88.85% <ø> (+0.04%)` | :arrow_up: |
| #single | `40.41% <ø> (+0.08%)` | :arrow_up: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/17051?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/io/gbq.py](https://codecov.io/gh/pandas-dev/pandas/pull/17051?src=pr&el=tree#diff-cGFuZGFzL2lvL2dicS5weQ==) | `25% <0%> (-58.34%)` | :arrow_down: |
| [pandas/core/frame.py](https://codecov.io/gh/pandas-dev/pandas/pull/17051?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvZnJhbWUucHk=) | `97.75% <0%> (-0.1%)` | :arrow_down: |
| [pandas/core/indexes/datetimes.py](https://codecov.io/gh/pandas-dev/pandas/pull/17051?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvaW5kZXhlcy9kYXRldGltZXMucHk=) | `95.23% <0%> (-0.1%)` | :arrow_down: |
| [pandas/core/ops.py](https://codecov.io/gh/pandas-dev/pandas/pull/17051?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvb3BzLnB5) | `93.67% <0%> (+1.65%)` | :arrow_up: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/17051?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/17051?src=pr&el=footer). Last update [d884e51...df6934c](https://codecov.io/gh/pandas-dev/pandas/pull/17051?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 @ysau : LGTM, ping when green! Thanks @ysau ! @jreback, @gfyoung Thanks for the guidance!