the rest api is too slow for get connection

[huzelong0]

hi,Mr Scott:
I am a developer from China,I have two questions on below:
1.we want to import mondrian-rest to our project ,but I found the rest api is too slow,all the request entry,they all need to get connection again and again, so whether we could make a Connection Pool to save time?

2 .I see there is a dependency in pom.xml:
<dependency>
<groupId>net.hydromatic</groupId>
<artifactId>foodmart-data-hsqldb</artifactId>
<version>${foodmart-hsqldb-version}</version>
</dependency>

if I need mysql, I have to change the jar to below, I can't connect the databases without it：

<dependency>
<groupId>net.hydromatic</groupId>
<artifactId>foodmart-data-mysql</artifactId>
<version>0.10</version>
</dependency>

the question is the jar was named "foodmart-data-mysql" ,so I guess it can be only work for foodmart, so how can I get connection on my own database ? does I need to overwrite the jar? or does there have a common jar for all database for connection?

thanks for your time and God bless all Americans for healthy