diff --git a/async search.md b/async search.md
index 846bff9ec..14851663e 100644
--- a/async search.md	
+++ b/async search.md	
@@ -7,6 +7,7 @@
   - `ab -n 100 -c 10 https://1.anagora.org/index`
     - ~10 seconds overall, 50% ~0.6 seconds, 99% ~2 seconds
   - on localhost (dev instance) the 99% goes up to 50-60 seconds, there are clear hangs.
+  - [[before and after cache]]
 - testing after disabling full text search:
   - on localhost (dev instance) the 99% goes down to 3-6s (!). as expected, but nice to see.
 
diff --git a/before and after cache.md b/before and after cache.md
new file mode 100644
index 000000000..f7a706c1a
--- /dev/null
+++ b/before and after cache.md	
@@ -0,0 +1,100 @@
+# before and after cache
+
+- before [[cache]]
+```
+This is ApacheBench, Version 2.3 <$Revision: 1879490 $>
+Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
+Licensed to The Apache Software Foundation, http://www.apache.org/
+
+Benchmarking 1.anagora.org (be patient).....done
+
+
+Server Software:        nginx/1.14.2
+Server Hostname:        1.anagora.org
+Server Port:            443
+SSL/TLS Protocol:       TLSv1.2,ECDHE-RSA-CHACHA20-POLY1305,2048,256
+Server Temp Key:        X25519 253 bits
+TLS Server Name:        1.anagora.org
+
+Document Path:          /index
+Document Length:        86661 bytes
+
+Concurrency Level:      10
+Time taken for tests:   8.594 seconds
+Complete requests:      100
+Failed requests:        0
+Total transferred:      8685300 bytes
+HTML transferred:       8666100 bytes
+Requests per second:    11.64 [#/sec] (mean)
+Time per request:       859.357 [ms] (mean)
+Time per request:       85.936 [ms] (mean, across all concurrent requests)
+Transfer rate:          986.99 [Kbytes/sec] received
+
+Connection Times (ms)
+              min  mean[+/-sd] median   max
+Connect:       83   86   4.7     85     118
+Processing:   508  709 387.8    615    2408
+Waiting:      394  596 387.8    502    2295
+Total:        591  794 389.3    700    2497
+
+Percentage of the requests served within a certain time (ms)
+  50%    700
+  66%    726
+  75%    743
+  80%    751
+  90%    782
+  95%   1816
+  98%   2471
+  99%   2497
+ 100%   2497 (longest request)
+```
+
+- after [[caching]]
+```
+flancian@paramita:/etc/nginx/sites-enabled$ ab -n 100 -c 10 https://1.anagora.org/index
+This is ApacheBench, Version 2.3 <$Revision: 1879490 $>
+Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
+Licensed to The Apache Software Foundation, http://www.apache.org/
+
+Benchmarking 1.anagora.org (be patient).....done
+
+
+Server Software:        nginx/1.14.2
+Server Hostname:        1.anagora.org
+Server Port:            443
+SSL/TLS Protocol:       TLSv1.2,ECDHE-RSA-CHACHA20-POLY1305,2048,256
+Server Temp Key:        X25519 253 bits
+TLS Server Name:        1.anagora.org
+
+Document Path:          /index
+Document Length:        86661 bytes
+
+Concurrency Level:      10
+Time taken for tests:   2.709 seconds
+Complete requests:      100
+Failed requests:        0
+Total transferred:      8685300 bytes
+HTML transferred:       8666100 bytes
+Requests per second:    36.91 [#/sec] (mean)
+Time per request:       270.912 [ms] (mean)
+Time per request:       27.091 [ms] (mean, across all concurrent requests)
+Transfer rate:          3130.81 [Kbytes/sec] received
+
+Connection Times (ms)
+              min  mean[+/-sd] median   max
+Connect:       83   85   1.7     85      91
+Processing:   164  170   4.2    169     194
+Waiting:       54   56   1.2     55      61
+Total:        248  255   4.8    254     279
+
+Percentage of the requests served within a certain time (ms)
+  50%    254
+  66%    256
+  75%    258
+  80%    258
+  90%    261
+  95%    265
+  98%    266
+  99%    279
+ 100%    279 (longest request)
+```
\ No newline at end of file