Testing overclock benefit in real life scenario

I am testing does the overclocking or MicrosSD card selection increase performance in real life scenario. In this scenario I play with two cards:

• Samsung EVO 8GB
• Samsung EVO 64GB Plus

I have multiple RPi3s and each computer has different boundaries limit. Before I got here I have already tested stability test for RAM with:

sudo su
apt-get install memtester -y
memtester 512m 4

This test takes a lot of time and while it is running I also check the temperature of heatsink:

sudo su
watch -n 1 vcgencmd measure_temp

And the winning RPi3 can take these settings:

hdmi_force_hotplug=1
hdmi_group=1
disable_overscan=1
gpu_mem_1024=64
force_turbo=1
arm_freq=1350
gpu_freq=550
core_freq=550
v3d_freq=550
sdram_freq=590
over_voltage=6
dtparam=audio=on
sdram_schmoo=0x02000020
over_voltage_sdram_p=6
over_voltage_sdram_i=4
over_voltage_sdram_c=4

And now I pushed fresh raspbian-jessie-lite to SD card and tried:

sudo su
apt-get update -y && apt-get install git -y && cd && git clone https://github.com/catonrug/raspbian-zabbix-3.git && cd raspbian-zabbix-3 && chmod +x agent-install.sh server-install.sh && time ./server-install.sh

There are a lot of happening underneath the hood, but one of specific things I follow extra attension is:

• inserting a lot of sql queries into MySQL database. takes ~2 minutes
• compile the applicaition. takes ~5 minutes

Here is results:

	8GB EVO	8GB EVO overclock	64GB EVO Plus	64GB EVO Plus overclock
processing schema.sql	1m54.859s	1m44.073s	0m39.110s	0m35.174s
processing images.sql	0m3.836s	0m3.664s	0m1.676s	0m1.084s
processing data.sql	0m5.386s	0m5.325s	0m4.850s	0m3.347s
make install	4m52.919s	4m18.792s	4m45.563s	4m10.863s

Overclock basic with propper cooling:

My personal max:

The PSU I am using in this test is Qoltec 5V 3A (Model 50002)