Thread pool: use thread pool to optimize query speed

For two unrelated businesses on the same page , We can optimize through thread pool .

Two test classes are written here , Compare
The speed gap between sequential execution and query using thread pool

@Test
    public void test211(){
    
        Long beginTime = new Date().getTime();
        System.out.println(beginTime+"-------- current time ");
        List<ActivityInfo> activity=activityService.listall("");
        List<ActivityInfo> activity2=activityService.listall("");
        Long endTime = new Date().getTime();
        System.out.println(endTime+"-------- End time ");
        System.out.println(new Date().getTime()-beginTime+"-------- Spend time ");
    }
    @Test
    public void test212() throws InterruptedException {
    
        Long beginTime = new Date().getTime();
        System.out.println(beginTime+"-------- current time ");
        ExecutorService executorService = Executors.newFixedThreadPool(2);
        executorService.submit(()->{
    
            List<ActivityInfo> activity=activityService.listall("");
        });
        executorService.submit(()->{
    
            List<ActivityInfo> activity2=activityService.listall("");
        });
        executorService.shutdown();
        executorService.awaitTermination(Long.MAX_VALUE, TimeUnit.MINUTES);
        Long endTime = new Date().getTime();
        System.out.println(endTime+"-------- End time ");
        System.out.println(new Date().getTime()-beginTime+"-------- Spend time ");

    }

Here is a small query written by yourself , So the difference is not big , When the data volume comes up, there will be an obvious speed gap .