## 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.
"Description": code_signing_obj.description,
            "LastModified": code_signing_obj.last_modified,
        }
    }
    return Response(json.dumps(result), status=201)
@app.route("/2020-04-22/code-signing-configs/<arn>", methods=["GET"])
def get_code_signing_config(arn):
    region = LambdaRegion.get()
    try:
        code_signing_obj = region.code_signing_configs[arn]
    except KeyError:
        msg = "The Lambda code signing configuration %s can not be found." % arn
        return not_found_error(msg)
    result = {
        "CodeSigningConfig": {
            "AllowedPublishers": {
                "SigningProfileVersionArns": code_signing_obj.signing_profile_version_arns
            },
            "CodeSigningConfigArn": code_signing_obj.arn,
            "CodeSigningConfigId": code_signing_obj.id,
            "CodeSigningPolicies": {
                "UntrustedArtifactOnDeployment": code_signing_obj.untrusted_artifact_on_deployment
            },
            "Description": code_signing_obj.description,
            "LastModified": code_signing_obj.last_modified,
        }
    }
    return Response(json.dumps(result), status=200)
@app.route("/2020-04-22/code-signing-configs/<arn>", methods=["DELETE"])
def delete_code_signing_config(arn):