超慢的 Facebook...

今天的 Facebook 慢到爆炸,看起來像是台灣機房的問題,這邊先提供 workaround:

把 DNS 改用 8.8.8.8,看起來 DNS 會解去洛杉磯的機房,速度就會正常多了。

接下來列出看到的結果,靜態的頁面 (拿 /robots.txt 測試) 沒問題:

Server Software:        
Server Hostname:        www.facebook.com
Server Port:            443
SSL/TLS Protocol:       TLSv1.2,ECDHE-ECDSA-AES128-GCM-SHA256,256,128

Document Path:          /robots.txt
Document Length:        4159 bytes

Concurrency Level:      1
Time taken for tests:   0.792 seconds
Complete requests:      20
Failed requests:        0
Total transferred:      99000 bytes
HTML transferred:       83180 bytes
Requests per second:    25.24 [#/sec] (mean)
Time per request:       39.612 [ms] (mean)
Time per request:       39.612 [ms] (mean, across all concurrent requests)
Transfer rate:          122.03 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:       28   30   0.6     30      31
Processing:     9   10   0.3     10      10
Waiting:        9    9   0.2      9      10
Total:         38   39   0.7     39      41

Percentage of the requests served within a certain time (ms)
  50%     39
  66%     40
  75%     40
  80%     40
  90%     40
  95%     41
  98%     41
  99%     41
 100%     41 (longest request)

但動態的頁面就慢到炸:

Server Software:        
Server Hostname:        www.facebook.com
Server Port:            443
SSL/TLS Protocol:       TLSv1.2,ECDHE-ECDSA-AES128-GCM-SHA256,256,128

Document Path:          /
Document Length:        0 bytes

Concurrency Level:      1
Time taken for tests:   20.294 seconds
Complete requests:      20
Failed requests:        0
Non-2xx responses:      20
Total transferred:      6700 bytes
HTML transferred:       0 bytes
Requests per second:    0.99 [#/sec] (mean)
Time per request:       1014.690 [ms] (mean)
Time per request:       1014.690 [ms] (mean, across all concurrent requests)
Transfer rate:          0.32 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:       28   30   0.9     29      32
Processing:   151  985 1144.5    567    4939
Waiting:      151  985 1144.5    567    4938
Total:        180 1014 1145.1    597    4971
WARNING: The median and mean for the initial connection time are not within a normal deviation
        These results are probably not that reliable.

Percentage of the requests served within a certain time (ms)
  50%    597
  66%   1226
  75%   1279
  80%   1667
  90%   2267
  95%   4971
  98%   4971
  99%   4971
 100%   4971 (longest request)
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