If we want to minimize allocations for every invocation, we need to look at types that currently allocate. Currently we use a String to hold the request id. However since the request id is a uuid, that string is 36 characters long. This is way above the 15 character string allocation threshold. The go to type in this case would be UUID. However UUID is in Foundation and we want to keep the lambda runtime Foundation free.
This pr introduces a LambdaRequestID to represent a uuid. One nice side effect of having our own uuid case is: We can make writing the uuid-string to a ByteBuffer allocation free (since no intermediate translation to a string is needed first).
tomerd
commented
2 years ago
If we want to minimize allocations for every invocation, we need to look at types that currently allocate. Currently we use a String to hold the request id. However since the request id is a uuid, that string is 36 characters long. This is way above the 15 character string allocation threshold. The go to type in this case would be
UUID. HoweverUUIDis in Foundation and we want to keep the lambda runtime Foundation free.This pr introduces a LambdaRequestID to represent a uuid. One nice side effect of having our own uuid case is: We can make writing the uuid-string to a ByteBuffer allocation free (since no intermediate translation to a string is needed first).
This pr does not add any public API.