It seems like the first byte is getting delayed until the first window of the gzip-encoded streams is being decoded (but ab shouldn't accept gzip encoding by default). Have you compared the results by using -H “Accept-Encoding: gzip,deflate” to see what's going on?
On Tuesday, January 17, 2017 at 3:57:41 PM UTC-5, Denys Koch wrote: > > 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 > -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/50c62721-2eb0-4226-b57d-72d16abc2f2a%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
