Hi - I was trying to run some basic performance tests on Spaces recently and after a certain level, the requests were getting rejected with 403s (sample below). Could someone indicate what rate limits are enforced on Spaces (open HTTP connections, max API calls, etc)? Thanks

Upload status 403 Forbidden: resp: &{Status:403 Forbidden StatusCode:403 Proto:HTTP/1.1 ProtoMajor:1 ProtoMinor:1 Header:map[X-Amz-Request-Id:[tx00000000000001037eae3-0059ae1784-8e28-nyc3a] Content-Length:[177] Accept-Ranges:[bytes] Content-Type:[application/xml] Date:[Tue, 05 Sep 2017 03:18:28 GMT] Strict-Transport-Security:[max-age=15552000; includeSubDomains; preload] Access-Control-Allow-Origin:[]] Body:0xc4202849c0 ContentLength:177 TransferEncoding:[] Close:false Uncompressed:false Trailer:map[] Request:0xc4200d22d0 TLS:0xc4200a86e0}