Setting CURLOPT_ACCEPT_ENCODING to an empty string will enable compressing and decompressing of cURL, which will:

1. Automatically compress the request body and request server respond with a compressed body to reduce network traffic.
2. Automatically decompress the response body according to the content-encoding header in the response.
3. Make curl decompressing response body automatically when users set the accept-encoding header manually (some SDKs sign requests with headers, making deleting the accept-encoding header impossible).

Without setting CURLOPT_ACCEPT_ENCODING, cURL will not decompress any response even a content-encoding header is set, enforcing users handle decompressing in JS with a poor performance.