I just bought 2 nodemcu 0.9 boards and tested then with <a href="http:&#x2F;&#x2F;www.nodemcu.com&#x2F;index_en.html" rel="nofollow">http:&#x2F;&#x2F;www.nodemcu.com&#x2F;index_en.html</a> and <a href="https:&#x2F;&#x2F;github.com&#x2F;esp8266&#x2F;Arduino" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;esp8266&#x2F;Arduino</a> and both of then have problems when tested with the board as webserver (panic&#x2F;reset and memory leaks&#x2F;freeze).<p>The ESPWebFramework was the only one so far that works and stay alive with the apache benchamrk tool:<p>ab -n 1000 -c 20 <a href="http:&#x2F;&#x2F;192.168.4.1&#x2F;confwifi" rel="nofollow">http:&#x2F;&#x2F;192.168.4.1&#x2F;confwifi</a><p>This is ApacheBench, Version 2.3 &lt;$Revision: 1528965 $&gt;<p>Copyright 1996 Adam Twiss, Zeus Technology Ltd, <a href="http:&#x2F;&#x2F;www.zeustech.net&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.zeustech.net&#x2F;</a><p>Licensed to The Apache Software Foundation, <a href="http:&#x2F;&#x2F;www.apache.org&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.apache.org&#x2F;</a><p>Benchmarking 192.168.4.1 (be patient)<p>Completed 100 requests<p>Completed 200 requests<p>Completed 300 requests<p>Completed 400 requests<p>Completed 500 requests<p>Completed 600 requests<p>Completed 700 requests<p>Completed 800 requests<p>Completed 900 requests<p>Completed 1000 requests<p>Finished 1000 requests<p>Server Software:<p>Server Hostname:        192.168.4.1<p>Server Port:            80<p>Document Path:          &#x2F;confwifi<p>Document Length:        3770 bytes<p>Concurrency Level:      20<p>Time taken for tests:   44.099 seconds<p>Complete requests:      1000<p>Failed requests:        0<p>Total transferred:      3855000 bytes<p>HTML transferred:       3770000 bytes<p>Requests per second:    22.68 [#&#x2F;sec] (mean)<p>Time per request:       881.980 [ms] (mean)<p>Time per request:       44.099 [ms] (mean, across all 
concurrent requests)<p>Transfer rate:          85.37 [Kbytes&#x2F;sec] received<p>Connection Times (ms)
              min  mean[+&#x2F;-sd] median   max<p>Connect:        1  160 1296.8      3   31044<p>Processing:    49  226 145.4    216    2104<p>Waiting:       13  165 121.4    159    2097<p>Total:         51  385 1321.4    222   31876<p>Percentage of the requests served within a certain time (ms)<p><pre><code>  50%    222

  66%    240

  75%    251

  80%    259

  90%    284

  95%   1211

  98%   2107

  99%   3235

 100%  31876 (longest request)</code></pre>