Through JVM Option +PrintInlining, we found that String has a constructor codeSize of 852, which is too large. This caused failed to inline.

The following is the output information of PrintInlining:
```
                @ 9 java.lang.String::<init> (12 bytes) inline (hot)
!m @ 1 java.nio.charset.Charset::defaultCharset (52 bytes) inline (hot)
! @ 8 java.lang.String::<init> (852 bytes) failed to inline: hot method too big
```
In Java code, the big method that cannot be inlined is the following constructor

```java
String(Charset charset, byte[] bytes, int offset, int length) {}
```
The above String constructor is too large; break it down into smaller methods with a codeSize under 325 to allow them to be inlined by the C2.