In Java you can create a shared connection pool for AWS lambda functions, e.g. using DI and initialising your injector statically when classes are loaded by the

In Java you can create a shared connection pool for AWS lambda functions, e.g. using DI and initialising your injector statically when classes are loaded by the JVM It relies on AWS using the same container/JVM for your invocations though which isn't guaranteed depending on what your load is.