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turso/core
Jussi Saurio 6ff5ff49b7 Merge 'perf/btree: use binary search for Index seek operations' from Jussi Saurio
## Beef
Followup to #1357 which did the same treatment for table btrees only.
After this PR, all of our seeks use binary search for both interior and
leaf pages.
## Perf comparison
using TPC-H 1GB db for this query:
```sql
limbo> explain select count(1) from lineitem join partsupp on l_partkey = ps_partkey and l_suppkey = ps_suppkey;
addr  opcode             p1    p2    p3    p4             p5  comment
----  -----------------  ----  ----  ----  -------------  --  -------
0     Init               0     18    0                    0   Start at 18
1     OpenRead           0     10    0                    0   table=lineitem, root=10
2     OpenRead           1     7     0                    0   table=sqlite_autoindex_partsupp_1, root=7
3     Rewind             0     14    0                    0   Rewind lineitem
4       Column           0     1     2                    0   r[2]=lineitem.l_partkey
5       IsNull           2     13    0                    0   if (r[2]==NULL) goto 13
6       Column           0     2     3                    0   r[3]=lineitem.l_suppkey
7       IsNull           3     13    0                    0   if (r[3]==NULL) goto 13
8       SeekGE           1     13    2                    0   key=[2..3] <-- index seek here, for every row in lineitem
9         IdxGT          1     13    2                    0   key=[2..3]
10        Integer        1     5     0                    0   r[5]=1
11        AggStep        0     5     4     count          0   accum=r[4] step(r[5])
12      Next             1     9     0                    0
13    Next               0     4     0                    0
14    AggFinal           0     4     0     count          0   accum=r[4]
15    Copy               4     1     0                    0   r[1]=r[4]
16    ResultRow          1     1     0                    0   output=r[1]
17    Halt               0     0     0                    0
18    Transaction        0     0     0                    0   write=false
19    Goto               0     1     0                    0
```
main:
```sql
limbo> select count(1) from lineitem join partsupp on l_partkey = ps_partkey and l_suppkey = ps_suppkey;
┌───────────┐
│ count (1) │
├───────────┤
│   6001215 │
└───────────┘
Command stats:
----------------------------
total: 40.292102375 s (this includes parsing/coloring of cli app)
```
PR:
```sql
limbo> select count(1) from lineitem join partsupp on l_partkey = ps_partkey and l_suppkey = ps_suppkey;
┌───────────┐
│ count (1) │
├───────────┤
│   6001215 │
└───────────┘
Command stats:
----------------------------
total: 14.021689916 s (this includes parsing/coloring of cli app)
```
almost 3x faster. buzzkill: still 3x slower than sqlite :)

Closes #1387
2025-04-24 10:53:35 +03:00
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wip
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