# Merged PRs
dolt

10095: support tls in the dolt metrics http endpoint

go-mysql-server

3310: Split Iter.Next(), RowToSQL, and callback into separate threads

This PR expands on an optimization where we separate iter.Next() and RowToSQL + callback() into two separate threads. Now, iter.Next(), RowToSQL, and callback() all run in their own goroutines with corresponding buffered channels communicating between them.

Additionally, this PR tidys up the resultForDefaultIter and resultForValueIter code.

Benchmarks: threads bump dolthub/dolt#10103 (comment)
3309: unsafe methods in SQL and SQLValue

This PR adds unsafe string access to EnumType.SQLValue() and SetType.SQLValue().

Additionally, uses string concat over SPrintf().

Benchmarks: test unsafe bump dolthub/dolt#10101 (comment)
3308: make IsNullable return true for nullable datetime functions

fixes dolthub/dolt#10092

I updated the datetime functions' IsNullable function based on whether they could return nil, using function_queries.go from #3305 as a reference.

We should probably do an audit of all our functions to make sure IsNullable is correct.

Closed Issues
Performance



Read Tests
MySQL
Dolt
Multiple




covering_index_scan
1.86
0.55
0.3


groupby_scan
13.7
13.7
1.0


index_join
1.5
2.07
1.38


index_join_scan
1.5
1.34
0.89


index_scan
34.33
23.95
0.7


oltp_point_select
0.2
0.28
1.4


oltp_read_only
3.82
5.28
1.38


select_random_points
0.35
0.58
1.66


select_random_ranges
0.39
0.57
1.46


table_scan
34.95
28.16
0.81


types_table_scan
75.82
80.03
1.06


reads_mean_multiplier


1.09






Write Tests
MySQL
Dolt
Multiple




oltp_delete_insert
8.43
6.55
0.78


oltp_insert
4.18
3.19
0.76


oltp_read_write
9.22
11.65
1.26


oltp_update_index
4.25
3.25
0.76


oltp_update_non_index
4.25
3.19
0.75


oltp_write_only
5.28
6.32
1.2


types_delete_insert
8.58
6.91
0.81


writes_mean_multiplier


0.9






TPC-C TPS Tests
MySQL
Dolt
Multiple




tpcc-scale-factor-1
93.7
36.51
2.57


tpcc_tps_multiplier


2.57



| Overall Mean Multiple | 1.52 |

|:---------------------:|:----:|

View the full release notes at https://github.com/dolthub/dolt/releases/tag/v1.78.2.