# Isolate Usage
Adam Klein: "naive use of [v8::Isolate::GetCurrent()] can be a performance bottleneck in a tight loop, since it involves thread-local storage"
# Handles
Adam Klein: "copying a Handle and creating a new Handle are different operations / the former doesn't really "do" anything / I think you're getting at one of the most confusing things in this API / which is that there's really no distinction between a v8::Object* and a v8::Handle<v8::Object>"
# V8 Strings
```
+- Name
|
+- String
|
+- SeqString
| |
| +- SeqOneByteString
| |
| +- SeqTwoByteString
|
+- ConsString
|
+- SlicedString
|
+- ExternalString
|
+- ExternalOneByteString
|
+- ExternalTwoByteString
```
