Github user cloud-fan commented on the issue:
https://github.com/apache/spark/pull/19811
I think we should do optimization incrementally. From
```
private int a;
private int b;
private int c;
...
a = 3;
b = 1;
c = 5;
...
```
to
```
int[] ints = new int[1001];
...
ints[0] = 3;
ints[1] = 1;
ints[2] = 5;
...
```
already hit our goal to reduce constant pool size, reducing the byte code
size of constructor is another story.
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