put results in a table and add some remarks

each entry has format: db_server, compiler, libraries

all build is release mode (with -O or equivalent).

| db    | language/runtime  | lib               | select (s) | update (s) |

|-------+-------------------+-------------------+------------+------------|

| pg9.4 | python/cpython2.7 | psycopg2          |       0.37 |       26.3 |

| pg9.4 | C/gcc             | libpq5            |       0.32 |       26.5 |

| pg9.4 | haskell/ghc8.0.1  | postgresql-simple |       0.63 |       27.2 |

| pg9.4 | haskell/ghc7.10.3 | postgresql-simple |       0.61 |       26.6 |

| pg9.4 | rust/rust1.13.0   | postgres          |       0.50 |       26.3 |

| pg9.4 | go/go1.7.3        | pq                |       0.37 |       27.2 |

| pg9.4 | racket/racket6.5  | built-in db       |       2.19 |       26.7 |

- Remarks:

  - python and go's db binding is as fast as C.

  - rust and haskell is slower. C is 1.65x faster.

  - racket is much slower. C is 6x faster.

** postgres 9.4, cpython 2.7, psycopg2==2.6.1

http://initd.org/psycopg/docs/usage.html

0.35

--

1.85

26.63

--

2.19

26.78

- I think I maybe testing disk IO performance. should use the pg bench cluster

  for benchmarking. bench cluster listen on port 5433.