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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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