To run these benchmarks, you need a $POSTGRES_URL and $MYSQL_URL.
These are the back-to-back runs of the same benchmarks. The results can vary wildly between runs, so even the output below is not necessarily what you will see.
PS C:\Users\cbw\Documents\go_sql_benchmarks> go test -bench . -postgres $env:POSTGRES_URL -mysql $env:MYSQL_URL -benchmem -cpuprofile profile
goos: windows
goarch: amd64
pkg: go_sql_benchmarks
cpu: AMD Ryzen 7 5800H with Radeon Graphics
Benchmark_sq_sqlite-16 435 2653646 ns/op 1223214 B/op 34837 allocs/op
Benchmark_sqlx_sqlite-16 462 2557698 ns/op 662743 B/op 32697 allocs/op
Benchmark_sq_postgres-16 100 17296691 ns/op 942763 B/op 17428 allocs/op
Benchmark_sqlx_postgres-16 100 23485573 ns/op 383384 B/op 15289 allocs/op
Benchmark_sq_mysql-16 255 5264942 ns/op 987399 B/op 17677 allocs/op
Benchmark_sqlx_mysql-16 796 4587407 ns/op 418755 B/op 13636 allocs/op
PASS
ok go_sql_benchmarks 12.971s
PS C:\Users\cbw\Documents\go_sql_benchmarks> go test -bench . -postgres $env:POSTGRES_URL -mysql $env:MYSQL_URL -benchmem -cpuprofile profile
goos: windows
goarch: amd64
pkg: go_sql_benchmarks
cpu: AMD Ryzen 7 5800H with Radeon Graphics
Benchmark_sq_sqlite-16 440 2654696 ns/op 1223230 B/op 34837 allocs/op
Benchmark_sqlx_sqlite-16 457 2588915 ns/op 662767 B/op 32697 allocs/op
Benchmark_sq_postgres-16 290 27419349 ns/op 942023 B/op 17426 allocs/op
Benchmark_sqlx_postgres-16 100 20488475 ns/op 383366 B/op 15289 allocs/op
Benchmark_sq_mysql-16 412 3157868 ns/op 987393 B/op 17677 allocs/op
Benchmark_sqlx_mysql-16 788 3045322 ns/op 418760 B/op 13636 allocs/op
PASS
ok go_sql_benchmarks 18.686s
PS C:\Users\cbw\Documents\go_sql_benchmarks> go test -bench . -postgres $env:POSTGRES_URL -mysql $env:MYSQL_URL -benchmem -cpuprofile profile
goos: windows
goarch: amd64
pkg: go_sql_benchmarks
cpu: AMD Ryzen 7 5800H with Radeon Graphics
Benchmark_sq_sqlite-16 436 2651153 ns/op 1223216 B/op 34837 allocs/op
Benchmark_sqlx_sqlite-16 463 2557336 ns/op 662759 B/op 32697 allocs/op
Benchmark_sq_postgres-16 100 20321208 ns/op 942675 B/op 17428 allocs/op
Benchmark_sqlx_postgres-16 100 23468400 ns/op 383365 B/op 15289 allocs/op
Benchmark_sq_mysql-16 733 5041293 ns/op 987402 B/op 17677 allocs/op
Benchmark_sqlx_mysql-16 787 3870108 ns/op 418757 B/op 13636 allocs/op
PASS
ok go_sql_benchmarks 15.305s