html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,performed_via_github_app,issue
https://github.com/pydata/xarray/pull/7374#issuecomment-1379571092,https://api.github.com/repos/pydata/xarray/issues/7374,1379571092,IC_kwDOAMm_X85SOpWU,14371165,2023-01-11T22:33:55Z,2023-01-11T22:33:55Z,MEMBER,"Benchmark are improved if I understand the logs correctly. Unfortunately not significant enough to make ASV report it though. The ratio  has to be >1.5 and the improvements on .time_open_dataset  are around 1.3-1.4. 

```
# PR:
[ 50.85%] ··· dataset_io.IOReadCustomEngine.time_open_dataset                 ok
[ 50.85%] ··· ======== =========
               chunks           
              -------- ---------
                None    130±1ms 
                 {}     689±6ms 
              ======== =========

[ 54.69%] ··· dataset_io.IOReadSingleFile.time_read_dataset                   ok
[ 54.69%] ··· ========= ============= =============
              --                   chunks          
              --------- ---------------------------
                engine       None           {}     
              ========= ============= =============
                scipy    5.48±0.04ms   6.91±0.01ms 
               netcdf4   2.93±0.04ms   4.32±0.02ms 
              ========= ============= =============

# Baseline:
[ 75.85%] ··· dataset_io.IOReadCustomEngine.time_open_dataset                 ok
[ 75.85%] ··· ======== ===========
               chunks             
              -------- -----------
                None    177±0.5ms 
                 {}      737±3ms  
              ======== ===========

[ 79.69%] ··· dataset_io.IOReadSingleFile.time_read_dataset                   ok
[ 79.69%] ··· ========= ============ ============
              --                  chunks         
              --------- -------------------------
                engine      None          {}     
              ========= ============ ============
                scipy    4.47±0.6ms   5.74±0.7ms 
               netcdf4   4.39±0.7ms   5.82±0.6ms 
              ========= ============ ============
```


```
# PR:
[ 50.85%] ··· dataset_io.IOReadCustomEngine.time_open_dataset                 ok
[ 50.85%] ··· ======== ==========
               chunks            
              -------- ----------
                None    149±4ms  
                 {}     797±20ms 
              ======== ==========

[ 54.69%] ··· dataset_io.IOReadSingleFile.time_read_dataset                   ok
[ 54.69%] ··· ========= ============ =============
              --                  chunks          
              --------- --------------------------
                engine      None           {}     
              ========= ============ =============
                scipy    6.57±0.2ms   7.77±0.01ms 
               netcdf4   3.71±0.1ms    6.17±0.5ms 
              ========= ============ =============

# Baseline:
[ 75.85%] ··· dataset_io.IOReadCustomEngine.time_open_dataset                 ok
[ 75.85%] ··· ======== ==========
               chunks            
              -------- ----------
                None    204±2ms  
                 {}     857±20ms 
              ======== ==========

[ 79.69%] ··· dataset_io.IOReadSingleFile.time_read_dataset                   ok
[ 79.69%] ··· ========= ============ ============
              --                  chunks         
              --------- -------------------------
                engine      None          {}     
              ========= ============ ============
                scipy     5.53±1ms    7.12±0.8ms 
               netcdf4   4.96±0.6ms   6.74±0.8ms 
              ========= ============ ============

```

```
# PR:
 [ 50.85%] ··· dataset_io.IOReadCustomEngine.time_open_dataset                 ok
[ 50.85%] ··· ======== ============
               chunks              
              -------- ------------
                None     204±8ms   
                 {}     1.20±0.04s 
              ======== ============

[ 54.69%] ··· dataset_io.IOReadSingleFile.time_read_dataset                   ok
[ 54.69%] ··· ========= ============ ============
              --                  chunks         
              --------- -------------------------
                engine      None          {}     
              ========= ============ ============
               netcdf4   6.86±0.7ms   9.81±0.6ms 
                scipy     6.74±1ms     9.10±1ms  
              ========= ============ ============

# Baseline:
[ 75.85%] ··· dataset_io.IOReadCustomEngine.time_open_dataset                 ok
[ 75.85%] ··· ======== ============
               chunks              
              -------- ------------
                None     282±5ms   
                 {}     1.20±0.04s 
              ======== ============


[ 79.69%] ··· dataset_io.IOReadSingleFile.time_read_dataset                   ok
[ 79.69%] ··· ========= ============ ============
              --                  chunks         
              --------- -------------------------
                engine      None          {}     
              ========= ============ ============
               netcdf4    6.91±1ms    9.77±0.7ms 
                scipy    6.91±0.7ms    9.11±1ms  
              ========= ============ ============
```","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,1490160140