Hi all!
When I upload assets to cloud storage with `gsutil cp -z js,css,html`,
then their TTFB (Time To First Byte) on serving increasing from ~20ms to
180ms.
This is big performance impact. Why is this happening and how to solve this?
Here more samples (URLs are still valid, if you want to try yourself):
$ ab -c 5 -n 50 https://storage.googleapis.com/latencytest/test-raw.txt
Concurrency Level: 5
Time taken for tests: 2.048 seconds
Complete requests: 50
Failed requests: 0
Total transferred: 45710 bytes
HTML transferred: 8050 bytes
Requests per second: 24.41 [#/sec] (mean)
Time per request: 204.846 [ms] (mean)
Time per request: 40.969 [ms] (mean, across all concurrent
requests)
Transfer rate: 21.79 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 88 117 16.7 112 160
Processing: 21 73 112.8 36 487
Waiting: 21 71 113.3 34 487
Total: 122 189 118.4 146 613
$ ab -c 5 -n 50 https://storage.googleapis.com/latencytest/test.txt
Concurrency Level: 5
Time taken for tests: 3.374 seconds
Complete requests: 50
Failed requests: 0
Total transferred: 45150 bytes
HTML transferred: 7250 bytes
Requests per second: 14.82 [#/sec] (mean)
Time per request: 337.403 [ms] (mean)
Time per request: 67.481 [ms] (mean, across all concurrent
requests)
Transfer rate: 13.07 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 90 109 9.0 107 136
Processing: 174 206 44.6 190 389
Waiting: 172 204 44.3 189 384
Total: 274 315 47.3 299 495
curl output for gzipped file:
$ curl -s -v https://storage.googleapis.com/latencytest/test.txt >
/dev/null
* Trying 2a00:1450:400e:805::2010...
* Connected to storage.googleapis.com (2a00:1450:400e:805::2010) port
443 (#0)
* TLS 1.2 connection using TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
* Server certificate: *.storage.googleapis.com
* Server certificate: Google Internet Authority G2
* Server certificate: GeoTrust Global CA
> GET /latencytest/test.txt HTTP/1.1
> Host: storage.googleapis.com
> User-Agent: curl/7.43.0
> Accept: */*
>
< HTTP/1.1 200 OK
< X-GUploader-UploadID:
AEnB2UpBZ1SoG2fiD3_qSOmIWWvL86Kd-r21kXOS08UlvMOc90Eco-vd3ol3NnwDrkJKwKk7zav0ePdp9QYXm7lt4NdV39h-VQ
< Date: Tue, 17 Jan 2017 20:44:19 GMT
< Cache-Control: no-transform
< Expires: Wed, 17 Jan 2018 20:44:19 GMT
< Last-Modified: Mon, 16 Jan 2017 13:46:54 GMT
< ETag: "88b49948e59eaad05d60a52001b50d7a"
< x-goog-generation: 1484574414392000
< x-goog-metageneration: 2
< x-goog-stored-content-encoding: gzip
< x-goog-stored-content-length: 145
< Content-Type: text/plain
< Content-Encoding: gzip
< Content-Language: en
< x-goog-hash: crc32c=MlL4Uw==
< x-goog-hash: md5=iLSZSOWeqtBdYKUgAbUNeg==
< x-goog-storage-class: STANDARD
< Accept-Ranges: bytes
< Server: UploadServer
< Alt-Svc: quic=":443"; ma=2592000; v="35,34"
< Transfer-Encoding: chunked
<
{ [261 bytes data]
* Connection #0 to host storage.googleapis.com left intact
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