## Problem
Currently, even if `LAMBDA_REMOTE_DOCKER=1`, we unzip the zip files in the directory they are in, which is usually /var/lib/localstack, which usually has a bind mount to the host.
On docker desktop, due to the use of grpc-FUSE (on macos), this can be very slow, about 200 times slower than on volumes / directly on the host. With experimental virtio filesystem enabled (also on macos), this can be reduced to about 30 times as slow, but still problematic.
This means a lambda may take a lot of time processing, for each additional layer some more. This especially affects nodejs lambdas with huge node_modules folders.

## Probable solution
At least if `LAMBDA_REMOTE_DOCKER=1`, we should leave the initial zip files on the bind mount (for persistence etc), but the working directories after unzipping should be located on non-bind mounts, to speed up the IO for unzipping.
)
        except Exception as e:
            
            LOG.debug("Unable to determine Lambda Java handler: %s", e)
    if not is_local_mount:
        
        if not is_zip_file(zip_file_content):
            raise ClientError(f"Uploaded Lambda code for runtime ({runtime}) is not in Zip format")
        
        if get_unzipped_size(archive_file) >= FUNCTION_MAX_UNZIPPED_SIZE:
            raise ClientError(
                error_response(
                    f"Unzipped size must be smaller than {FUNCTION_MAX_UNZIPPED_SIZE} bytes",
                    code=400,
                    error_type="InvalidParameterValueException",
                )
            )
        unzip(archive_file, lambda_cwd)
    
    if not is_java:
        handler_file = get_handler_file_from_name(handler_name, runtime=runtime)
        main_file = "%s/%s" % (lambda_cwd, handler_file)
        if CHECK_HANDLER_ON_CREATION and not os.path.exists(main_file):
            
            
            
            if not is_local_mount or not use_docker() or config.LAMBDA_REMOTE_DOCKER:
                file_list = run('cd "%s"; du -d 3 .' % lambda_cwd)
                config_debug = 'Config for local mount, docker, remote: "%s", "%s", "%s"' % (
                    is_local_mount,