## 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.
@app.route("%s/functions/<function>/aliases/<name>" % API_PATH_ROOT, methods=["PUT"])
def update_alias(function, name):
    region = LambdaRegion.get()
    arn = func_arn(function)
    if arn not in region.lambdas:
        return not_found_error(arn)
    if name not in region.lambdas.get(arn).aliases:
        return not_found_error(msg="Alias not found: %s:%s" % (arn, name))
    current_alias = region.lambdas.get(arn).aliases.get(name)
    data = json.loads(request.data)
    version = data.get("FunctionVersion") or current_alias.get("FunctionVersion")
    description = data.get("Description") or current_alias.get("Description")
    return jsonify(do_update_alias(arn, name, version, description))
@app.route("%s/functions/<function>/aliases/<name>" % API_PATH_ROOT, methods=["GET"])
def get_alias(function, name):
    region = LambdaRegion.get()
    arn = func_arn(function)
    if arn not in region.lambdas:
        return not_found_error(arn)
    if name not in region.lambdas.get(arn).aliases:
        return not_found_error(msg="Alias not found: %s:%s" % (arn, name))
    return jsonify(region.lambdas.get(arn).aliases.get(name))
@app.route("%s/functions/<function>/aliases" % API_PATH_ROOT, methods=["GET"])
def list_aliases(function):
    region = LambdaRegion.get()
    arn = func_arn(function)
    if arn not in region.lambdas:
        return not_found_error(arn)
    return jsonify(
        {"Aliases": sorted(region.lambdas.get(arn).aliases.values(), key=lambda x: x["Name"])}