use unsafe pointer for TextStorage

[jycor]

unsafe.Pointer gets strings from []byte without allocating memory.
This is especially beneficial for operations that pass around strings.
Dolt already uses unsafe.Pointers in other places and this is within an immutable context.

[jycor]

#benchmark

[github-actions]

@jycor workflow run: https://github.com/dolthub/dolt/actions/runs/18765109817

[coffeegoddd]

@jycor DOLT

comparing_percentages
100.000000 to 100.000000

version	result	total
5e13e84	ok	5937471

version	total_tests
5e13e84	5937471

correctness_percentage
100.0

[coffeegoddd]

@jycor DOLT

test_name	from_latency_p95	to_latency_p95	percent_change
tpcc-scale-factor-1	66.84	66.84	0.0

test_name	from_server_name	from_server_version	from_tps	to_server_name	to_server_version	to_tps	percent_change
tpcc-scale-factor-1	dolt	305fe1b	35.45	dolt	5e13e84	35.72	0.76

[coffeegoddd]

@jycor DOLT

read_tests	from_latency	to_latency	percent_change
covering_index_scan	0.65	0.65	0.0
groupby_scan	19.29	18.95	-1.76
index_join	2.43	2.43	0.0
index_join_scan	1.37	1.37	0.0
index_scan	30.26	30.81	1.82
oltp_point_select	0.28	0.28	0.0
oltp_read_only	5.37	5.37	0.0
select_random_points	0.58	0.58	0.0
select_random_ranges	0.61	0.61	0.0
table_scan	33.12	32.53	-1.78
types_table_scan	130.13	127.81	-1.78

write_tests	from_latency	to_latency	percent_change
oltp_delete_insert	6.55	6.55	0.0
oltp_insert	3.25	3.25	0.0
oltp_read_write	11.87	11.87	0.0
oltp_update_index	3.3	3.3	0.0
oltp_update_non_index	3.25	3.25	0.0
oltp_write_only	6.43	6.43	0.0
types_delete_insert	7.04	7.04	0.0

[coffeegoddd]

@jycor DOLT

comparing_percentages
100.000000 to 100.000000

version	result	total
f17fdcd	ok	5937471

version	total_tests
f17fdcd	5937471

correctness_percentage
100.0

[macneale4]

LGTM

[github-actions]

@coffeegoddd DOLT

test_name	detail	row_cnt	sorted	mysql_time	sql_mult	cli_mult
batching	LOAD DATA	10000	1	0.07	1.43
batching	batch sql	10000	1	0.1	1.5
batching	by line sql	10000	1	0.12	1.17
blob	1 blob	200000	1	0.89	4.31	4.34
blob	2 blobs	200000	1	0.91	4.63	4.6
blob	no blob	200000	1	0.89	2.98	2.82
col type	datetime	200000	1	0.83	2.82	2.84
col type	varchar	200000	1	0.7	3.76	3.63
config width	2 cols	200000	1	0.81	3	2.89
config width	32 cols	200000	1	1.91	2.95	3.75
config width	8 cols	200000	1	0.99	2.93	3.64
pk type	float	200000	1	0.82	2.83	2.85
pk type	int	200000	1	0.78	2.91	2.97
pk type	varchar	200000	1	1.47	1.93	1.9
row count	1.6mm	1600000	1	5.65	3.37	3.4
row count	400k	400000	1	1.46	3.16	3.22
row count	800k	800000	1	2.94	3.2	3.25
secondary index	four index	200000	1	3.57	1.57	1.47
secondary index	no secondary	200000	1	0.92	2.9	2.74
secondary index	one index	200000	1	1.17	2.75	2.79
secondary index	two index	200000	1	2.01	2.01	1.8
sorting	shuffled 1mm	1000000	0	5.09	3.16	3.14
sorting	sorted 1mm	1000000	1	5.17	3.12	3.14

[github-actions]

@coffeegoddd DOLT

name	detail	mean_mult
dolt_blame_basic	system table	1.17
dolt_blame_commit_filter	system table	2.85
dolt_commit_ancestors_commit_filter	system table	0.62
dolt_commits_commit_filter	system table	1.09
dolt_diff_log_join_from_commit	system table	2.86
dolt_diff_log_join_to_commit	system table	2.88
dolt_diff_table_from_commit_filter	system table	1.27
dolt_diff_table_to_commit_filter	system table	1.17
dolt_diffs_commit_filter	system table	1
dolt_history_commit_filter	system table	1.4
dolt_log_commit_filter	system table	1.09

[github-actions]

@coffeegoddd DOLT

name	add_cnt	delete_cnt	update_cnt	latency
adds_only	60000	0	0	0.84
adds_updates_deletes	60000	60000	60000	4.4
deletes_only	0	60000	0	2.13
updates_only	0	0	60000	2.77

[github-actions]

@coffeegoddd DOLT

test_name	detail	row_cnt	sorted	mysql_time	sql_mult	cli_mult
batching	LOAD DATA	10000	1	0.06	1.67
batching	batch sql	10000	1	0.07	2.14
batching	by line sql	10000	1	0.08	1.63
blob	1 blob	200000	1	0.87	4.66	4.54
blob	2 blobs	200000	1	0.86	5.06	5.26
blob	no blob	200000	1	0.88	3.09	2.91
col type	datetime	200000	1	0.83	2.9	2.88
col type	varchar	200000	1	0.66	4.17	4.26
config width	2 cols	200000	1	0.79	2.94	3.76
config width	32 cols	200000	1	1.94	2.94	2.79
config width	8 cols	200000	1	0.94	3.15	3.34
pk type	float	200000	1	0.85	3.07	2.81
pk type	int	200000	1	0.81	3.16	2.9
pk type	varchar	200000	1	1.44	2.01	2.02
row count	1.6mm	1600000	1	5.73	3.37	3.4
row count	400k	400000	1	1.4	3.34	3.42
row count	800k	800000	1	2.76	3.49	3.49
secondary index	four index	200000	1	3.67	1.55	1.5
secondary index	no secondary	200000	1	0.87	3.09	2.95
secondary index	one index	200000	1	1.1	3.02	3.07
secondary index	two index	200000	1	2.02	2.04	1.79
sorting	shuffled 1mm	1000000	0	5.29	3.19	3.29
sorting	sorted 1mm	1000000	1	5.29	3.22	3.3

[github-actions]

@coffeegoddd DOLT

name	add_cnt	delete_cnt	update_cnt	latency
adds_only	60000	0	0	0.86
adds_updates_deletes	60000	60000	60000	4.94
deletes_only	0	60000	0	2.22
updates_only	0	0	60000	2.98

[github-actions]

@coffeegoddd DOLT

test_name	detail	row_cnt	sorted	mysql_time	sql_mult	cli_mult
batching	LOAD DATA	10000	1	0.05	2
batching	batch sql	10000	1	0.07	2
batching	by line sql	10000	1	0.07	1.86
blob	1 blob	200000	1	0.89	4.34	4.33
blob	2 blobs	200000	1	0.89	4.72	4.78
blob	no blob	200000	1	0.89	2.98	2.8
col type	datetime	200000	1	0.78	3	3.01
col type	varchar	200000	1	0.66	3.95	3.74
config width	2 cols	200000	1	0.78	2.95	4.05
config width	32 cols	200000	1	1.91	2.94	2.77
config width	8 cols	200000	1	0.96	3.04	3.2
pk type	float	200000	1	0.82	3.18	2.83
pk type	int	200000	1	0.88	2.65	2.63
pk type	varchar	200000	1	1.52	2	1.82
row count	1.6mm	1600000	1	5.74	3.33	3.35
row count	400k	400000	1	1.41	3.3	3.32
row count	800k	800000	1	2.85	3.35	3.34
secondary index	four index	200000	1	3.61	1.58	1.44
secondary index	no secondary	200000	1	0.88	3	2.83
secondary index	one index	200000	1	1.1	3	2.94
secondary index	two index	200000	1	1.97	2.07	1.82
sorting	shuffled 1mm	1000000	0	4.92	3.3	3.16
sorting	sorted 1mm	1000000	1	5.01	3.23	3.13

[github-actions]

@coffeegoddd DOLT

name	detail	mean_mult
dolt_blame_basic	system table	1.16
dolt_blame_commit_filter	system table	2.83
dolt_commit_ancestors_commit_filter	system table	0.63
dolt_commits_commit_filter	system table	1.05
dolt_diff_log_join_from_commit	system table	2.79
dolt_diff_log_join_to_commit	system table	2.79
dolt_diff_table_from_commit_filter	system table	1.2
dolt_diff_table_to_commit_filter	system table	1.23
dolt_diffs_commit_filter	system table	1.03
dolt_history_commit_filter	system table	1.52
dolt_log_commit_filter	system table	1.05

[github-actions]

@coffeegoddd DOLT

name	add_cnt	delete_cnt	update_cnt	latency
adds_only	60000	0	0	0.86
adds_updates_deletes	60000	60000	60000	4.32
deletes_only	0	60000	0	2.14
updates_only	0	0	60000	2.85