Javet Performance#

In V8, a context is an execution environment that allows separate, unrelated, JavaScript applications to run in a single instance of V8.

It's recommended to reset context if a new execution environment is required.

Result#

Here is the performance test result from i7 10700K + Windows 10. Test case is just 1 + 1 = 2.

Node.js performs slightly better in Single Context mode mainly because the V8 embedded in Node.js is much older than the built-in V8.
Built-in V8 dramatically outperforms Node.js in Ad-hoc mode mainly because Node.js comes with a huge overhead that seriously slows down the context and isolate creation and recycle.
It's recommended to use built-in V8 unless Node.js is required in some particular cases.
Node.js on Linux is built as position independent code which comes with an additional performance overhead.