MemoryBenchmark

Memory Benchmark

The MemoryBenchmark.ino was compiled with each FEATURE_* and the flash memory and static RAM sizes were recorded. The FEATURE_BASELINE selection is the baseline, and its memory usage numbers are subtracted from the subsequent FEATURE_* memory usage.

Version: AUnit v1.7.1

DO NOT EDIT: This file was auto-generated using make README.md.

How to Regenerate

To regenerate this README.md:

$ make clean_benchmarks
$ make benchmarks
$ make README.md

The make benchmarks target uses collect.sh script which calls auniter.sh (https://github.com/bxparks/AUniter) to invoke the Arduino IDE programmatically. It produces a *.txt file with the flash and ram usage information (e.g. nano.txt).

The make README.md command calls the generated_readme.py Python script which generates this README.md file. The ASCII tables below are generated by the generate_table.awk script, which takes each *.txt file and converts it to an ASCII table.

Library Size Changes

Arduino Nano

• 16MHz ATmega328P
• Arduino IDE 1.8.19, Arduino CLI 0.33.0
• Arduino AVR Boards 1.8.6

+---------------------------------------------------------------------+
| Functionality                          |  flash/  ram |       delta |
|----------------------------------------+--------------+-------------|
| Baseline                               |   1586/  185 |     0/    0 |
|----------------------------------------+--------------+-------------|
| AUnit Single Test                      |   4456/  366 |  2870/  181 |
| AUnit Single Test Verbose              |   4500/  366 |  2914/  181 |
+---------------------------------------------------------------------+

Sparkfun Pro Micro

• 16 MHz ATmega32U4
• Arduino IDE 1.8.19, Arduino CLI 0.33.0
• SparkFun AVR Boards 1.1.13

+---------------------------------------------------------------------+
| Functionality                          |  flash/  ram |       delta |
|----------------------------------------+--------------+-------------|
| Baseline                               |   3572/  150 |     0/    0 |
|----------------------------------------+--------------+-------------|
| AUnit Single Test                      |   6410/  329 |  2838/  179 |
| AUnit Single Test Verbose              |   6454/  329 |  2882/  179 |
+---------------------------------------------------------------------+

SAMD21 Seeeduino XIAO M0

• SAMD51, 120 MHz ARM Cortex-M4
• Arduino IDE 1.8.19, Arduino CLI 0.33.0
• Seeeduino SAMD 1.8.4

+---------------------------------------------------------------------+
| Functionality                          |  flash/  ram |       delta |
|----------------------------------------+--------------+-------------|
| Baseline                               |  34164/    0 |     0/    0 |
|----------------------------------------+--------------+-------------|
| AUnit Single Test                      |  36436/    0 |  2272/    0 |
| AUnit Single Test Verbose              |  36492/    0 |  2328/    0 |
+---------------------------------------------------------------------+

STM32 Blue Pill

• STM32F103C8, 72 MHz ARM Cortex-M3
• Arduino IDE 1.8.19, Arduino CLI 0.33.0
• STM32duino 2.5.0

+---------------------------------------------------------------------+
| Functionality                          |  flash/  ram |       delta |
|----------------------------------------+--------------+-------------|
| Baseline                               |  21540/ 3836 |     0/    0 |
|----------------------------------------+--------------+-------------|
| AUnit Single Test                      |  23648/ 3904 |  2108/   68 |
| AUnit Single Test Verbose              |  23704/ 3904 |  2164/   68 |
+---------------------------------------------------------------------+

SAMD51 Adafruit ItsyBitsy M4

• SAMD51, 120 MHz ARM Cortex-M4
• Arduino IDE 1.8.19, Arduino CLI 0.33.0
• Adafruit SAMD 1.7.11

+---------------------------------------------------------------------+
| Functionality                          |  flash/  ram |       delta |
|----------------------------------------+--------------+-------------|
| Baseline                               |  10664/    0 |     0/    0 |
|----------------------------------------+--------------+-------------|
| AUnit Single Test                      |  12816/    0 |  2152/    0 |
| AUnit Single Test Verbose              |  12872/    0 |  2208/    0 |
+---------------------------------------------------------------------+

ESP8266

• NodeMCU 1.0, 80MHz ESP8266
• Arduino IDE 1.8.19, Arduino CLI 0.33.0
• ESP8266 Boards 3.0.2

+---------------------------------------------------------------------+
| Functionality                          |  flash/  ram |       delta |
|----------------------------------------+--------------+-------------|
| Baseline                               | 264949/27984 |     0/    0 |
|----------------------------------------+--------------+-------------|
| AUnit Single Test                      | 268021/28148 |  3072/  164 |
| AUnit Single Test Verbose              | 268081/28148 |  3132/  164 |
+---------------------------------------------------------------------+

ESP32

• ESP32-01 Dev Board, 240 MHz Tensilica LX6
• Arduino IDE 1.8.19, Arduino CLI 0.33.0
• ESP32 Boards 2.0.9

+---------------------------------------------------------------------+
| Functionality                          |  flash/  ram |       delta |
|----------------------------------------+--------------+-------------|
| Baseline                               | 259189/22352 |     0/    0 |
|----------------------------------------+--------------+-------------|
| AUnit Single Test                      | 265273/22448 |  6084/   96 |
| AUnit Single Test Verbose              | 265341/22448 |  6152/   96 |
+---------------------------------------------------------------------+

RAM usage remains constant as more objects are created, which indicates that an initial pool of a certain minimum size is created regardless of the actual RAM usage by objects.