I just bought 2 nodemcu 0.9 boards and tested then with http://www.nodemcu.com/index_en.html http://www.nodemcu.com/index_en.html and https://github.com/esp8266

I just bought 2 nodemcu 0.9 boards and tested then with http://www.nodemcu.com/index_en.html http://www.nodemcu.com/index_en.html and https://github.com/esp8266/Arduino https://github.com/esp8266/Arduino and both of then have problems when tested with the board as webserver (panic/reset and memory leaks/freeze). The ESPWebFramework was the only one so far that works and stay alive with the apache benchamrk tool: ab -n 1000 -c 20 http://192.168.4.1/confwifi http://192.168.4.1/confwifi This is ApacheBench, Version 2.3 <$Revision: 1528965 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ http://www.zeustech.net/ Licensed to The Apache Software Foundation, http://www.apache.org/ http://www.apache.org/ Benchmarking 192.168.4.1 (be patient) Completed 100 requests Completed 200 requests Completed 300 requests Completed 400 requests Completed 500 requests Completed 600 requests Completed 700 requests Completed 800 requests Completed 900 requests Completed 1000 requests Finished 1000 requests Server Software: Server Hostname: 192.168.4.1 Server Port: 80 Document Path: /confwifi Document Length: 3770 bytes Concurrency Level: 20 Time taken for tests: 44.099 seconds Complete requests: 1000 Failed requests: 0 Total transferred: 3855000 bytes HTML transferred: 3770000 bytes Requests per second: 22.68 [#/sec] (mean) Time per request: 881.980 [ms] (mean) Time per request: 44.099 [ms] (mean, across all concurrent requests) Transfer rate: 85.37 [Kbytes/sec] received Connection Times (ms) min mean[+/-sd] median max Connect: 1 160 1296.8 3 31044 Processing: 49 226 145.4 216 2104 Waiting: 13 165 121.4 159 2097 Total: 51 385 1321.4 222 31876 Percentage of the requests served within a certain time (ms) 50% 222 66% 240 75% 251 80% 259 90% 284 95% 1211 98% 2107 99% 3235 100% 31876 (longest request)