add java-jdbc version

out/

build/

* COMMENT -*- mode: org -*-

#+Date: 2016-12-16

Time-stamp: <2017-01-26>

Time-stamp: <2019-02-23>

* database binding benchmark

I want to know the efficiency of the db binding for different language,

- Remarks:

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

  - rust, haskell, cl is slower. C is 1.5x faster.

  - racket is much slower. C is 5x faster.

  - racket is much slower. C is 5x faster than racket.

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

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

  0.54

  28.51

  no effect.

** 2019-02-23 on new ryzen5 PC. postgres 9.6 on M2 SSD. openjdk 1.8.0_162, jdbc postgresql 42.2.5

warming up JVM...

select time cost: 0.29s

update time cost: 2.68s

--

warming up JVM...

select time cost: 0.27s

update time cost: 2.67s

--

select time cost: 0.35s

update time cost: 2.72s

--

select time cost: 0.33s

update time cost: 2.75s

--

run:

	PG_T1_PASSWORD="62IWgtWiPCZdt8qu" ./gradlew build run

.PHONY: run

/*

 * This file was generated by the Gradle 'init' task.

 *

 * This generated file contains a sample Java project to get you started.

 * For more details take a look at the Java Quickstart chapter in the Gradle

 * user guide available at https://docs.gradle.org/4.6/userguide/tutorial_java_projects.html

 */

plugins {

    // Apply the java plugin to add support for Java

    id 'java'

    // Apply the application plugin to add support for building an application

    id 'application'

}

// Define the main class for the application

mainClassName = 'App'

dependencies {

    // This dependency is found on compile classpath of this component and consumers.

    // compile 'com.google.guava:guava:23.0'

    compile group: 'org.postgresql', name: 'postgresql', version: '42.2.5'

    // Use JUnit test framework

    testCompile 'junit:junit:4.12'

}

// In this section you declare where to find the dependencies of your project

repositories {

    // Use jcenter for resolving your dependencies.

    // You can declare any Maven/Ivy/file repository here.

    jcenter()

}

distributionBase=GRADLE_USER_HOME

distributionPath=wrapper/dists

distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-bin.zip

zipStoreBase=GRADLE_USER_HOME

zipStorePath=wrapper/dists