"user=pqgotest dbname=pqgotest sslmode=verify-full"

p := Parameters{
    DBname:   "pqgotest",
    User:     "pqgotest",
    Password: "secret",
    Host:     "db.example.com",
    Port:     1234,
    SSLmode:  SSLVerifyFull,
    // Use single quotes in values with space!
    FallbackApplicationName: "'pqdsn test'",
}

dsn := p.String()
fmt.Println(dsn)

dbname=pqgotest user=pqgotest password=secret host=db.example.com port=1234 sslmode=verify-full fallback_application_name='pqdsn test'

goos: linux
goarch: amd64
pkg: github.com/moapis/pqdsn
BenchmarkBuilder_addString-8                     2407327               461 ns/op             273 B/op          1 allocs/op
BenchmarkParameters_String-8                     2853232               423 ns/op             356 B/op          4 allocs/op
BenchmarkParameters_EscapedString_esc-8          1000000              1099 ns/op             644 B/op          5 allocs/op
PASS
ok      github.com/moapis/pqdsn 4.398s