Implement buffer for TupleBuilder

[jycor]

If this works, remove BuffPool implementation with actual []byte buffer or a real sync.Pool

[jycor]

#benchmark

[github-actions]

@jycor workflow run: https://github.com/dolthub/dolt/actions/runs/19450146827

[coffeegoddd]

@jycor DOLT

comparing_percentages
100.000000 to 100.000000

version	result	total
6a304fb	ok	5937471

version	total_tests
6a304fb	5937471

correctness_percentage
100.0

[coffeegoddd]

@jycor DOLT

test_name	from_latency_p95	to_latency_p95	percent_change
tpcc-scale-factor-1	63.32	63.32	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	b64ad08	37.24	dolt	6a304fb	36.69	-1.48

[coffeegoddd]

@jycor DOLT

read_tests	from_latency	to_latency	percent_change
covering_index_scan	0.55	0.55	0.0
groupby_scan	13.7	13.7	0.0
index_join	2.07	2.07	0.0
index_join_scan	1.32	1.34	1.52
index_scan	28.67	28.67	0.0
oltp_point_select	0.28	0.28	0.0
oltp_read_only	5.18	5.18	0.0
select_random_points	0.58	0.57	-1.72
select_random_ranges	0.57	0.57	0.0
table_scan	28.67	28.16	-1.78
types_table_scan	92.42	92.42	0.0

write_tests	from_latency	to_latency	percent_change
oltp_delete_insert	6.55	6.55	0.0
oltp_insert	3.19	3.25	1.88
oltp_read_write	11.45	11.45	0.0
oltp_update_index	3.25	3.25	0.0
oltp_update_non_index	3.19	3.19	0.0
oltp_write_only	6.32	6.32	0.0
types_delete_insert	6.91	6.91	0.0

[jycor]

#benchmark

[github-actions]

@jycor workflow run: https://github.com/dolthub/dolt/actions/runs/19485332516

[coffeegoddd]

@jycor DOLT

test_name	from_latency_p95	to_latency_p95	percent_change
tpcc-scale-factor-1	63.32	63.32	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	f6e9519	36.56	dolt	166e122	35.98	-1.59

[coffeegoddd]

@jycor DOLT

comparing_percentages
100.000000 to 100.000000

version	result	total
ab36245	ok	5937471

version	total_tests
ab36245	5937471

correctness_percentage
100.0

[coffeegoddd]

@jycor DOLT

read_tests	from_latency	to_latency	percent_change
covering_index_scan	0.57	0.56	-1.75
groupby_scan	13.95	14.21	1.86
index_join	2.07	2.07	0.0
index_join_scan	1.32	1.32	0.0
index_scan	29.19	29.19	0.0
oltp_point_select	0.28	0.28	0.0
oltp_read_only	5.18	5.18	0.0
select_random_points	0.58	0.59	1.72
select_random_ranges	0.57	0.57	0.0
table_scan	28.16	28.16	0.0
types_table_scan	94.1	94.1	0.0

write_tests	from_latency	to_latency	percent_change
oltp_delete_insert	6.55	6.55	0.0
oltp_insert	3.19	3.25	1.88
oltp_read_write	11.65	11.65	0.0
oltp_update_index	3.25	3.3	1.54
oltp_update_non_index	3.19	3.19	0.0
oltp_write_only	6.32	6.32	0.0
types_delete_insert	6.91	6.91	0.0

[jycor]

#benchmark

[github-actions]

@jycor workflow run: https://github.com/dolthub/dolt/actions/runs/19487313064

[coffeegoddd]

@jycor DOLT

test_name	from_latency_p95	to_latency_p95	percent_change
tpcc-scale-factor-1	63.32	64.47	1.82

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	256bfca	36.97	dolt	ab36245	36.49	-1.3

[coffeegoddd]

@jycor DOLT

read_tests	from_latency	to_latency	percent_change
covering_index_scan	0.57	0.56	-1.75
groupby_scan	13.7	13.95	1.82
index_join	2.03	2.07	1.97
index_join_scan	1.32	1.32	0.0
index_scan	29.19	29.19	0.0
oltp_point_select	0.28	0.28	0.0
oltp_read_only	5.18	5.18	0.0
select_random_points	0.57	0.59	3.51
select_random_ranges	0.57	0.57	0.0
table_scan	28.16	28.16	0.0
types_table_scan	94.1	92.42	-1.79

write_tests	from_latency	to_latency	percent_change
oltp_delete_insert	6.55	6.55	0.0
oltp_insert	3.19	3.25	1.88
oltp_read_write	11.65	11.65	0.0
oltp_update_index	3.3	3.3	0.0
oltp_update_non_index	3.19	3.19	0.0
oltp_write_only	6.32	6.32	0.0
types_delete_insert	6.91	6.91	0.0