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turso/PERF.md
2025-04-22 21:36:07 -04:00

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# Performance Testing
## Mobibench
1. Clone the source repository of Mobibench fork for Limbo:
```console
git clone git@github.com:penberg/Mobibench.git
```
2. Change `LIBS` in `shell/Makefile` to point to your Limbo source repository.
3. Build Mobibench:
```console
cd shell && make
```
4. Run Mobibench:
```console
./mobibench -p <benchmark-directory> -n 1000 -d 0 -j 4
```
## Clickbench
We have a modified version of the Clickbench benchmark script that can be run with:
```shell
make clickbench
```
This will build Limbo in release mode, create a database, and run the benchmarks with a small subset of the Clickbench dataset.
It will run the queries for both Limbo and SQLite, and print the results.
## Comparing VFS's/IO Back-ends (io_uring | syscall)
```shell
make bench-vfs SQL="select * from users;" N=500
```
The naive script will build and run limbo in release mode and execute the given SQL (against a copy of the `testing/testing.db` file)
`N` times with each `vfs`. This is not meant to be a definitive or thorough performance benchmark but serves to compare the two.
## TPC-H
1. Clone the Taratool TPC-H benchmarking tool:
```shell
git clone git@github.com:tarantool/tpch.git
```
2. Patch the benchmark runner script:
```patch
diff --git a/bench_queries.sh b/bench_queries.sh
index 6b894f9..c808e9a 100755
--- a/bench_queries.sh
+++ b/bench_queries.sh
@@ -4,7 +4,7 @@ function check_q {
local query=queries/$*.sql
(
echo $query
- time ( sqlite3 TPC-H.db < $query > /dev/null )
+ time ( ../../limbo/target/release/limbo -m list TPC-H.db < $query > /dev/null )
)
}
```