Less memory building from sources

Hi guys,

I noticed that I have less memory available when I build from sources than then already available firmwares

I did the tests with the release 2V01 and ESP32 board. These are the results:

Downloaded Firmware RELEASE 2V01

File sizes:

   15168 abr 16 10:34 bootloader.bin
 1346960 abr 16 10:34 espruino_esp32.bin
    3072 abr 16 10:34 partitions_espruino.bin

Info from Espruino IDE:

>reset();
=undefined
WARNING: gap set scan error code = 103
WARNING: set rssi scan not implemeted yet
 ____                 _
|  __|___ ___ ___ _ _|_|___ ___
|  __|_ -| . |  _| | | |   | . |
|____|___|  _|_| |___|_|_|_|___|
         |_| espruino.com
 2v01 (c) 2018 G.Williams
Espruino is Open Source. Our work is supported
only by sales of official boards and donations:
http://espruino.com/Donate
>process.memory();
={ free: 3975, usage: 25, total: 4000, history: 0,
  gc: 0, gctime: 3.044 }
>process.env
={
  VERSION: "2v01",
  GIT_COMMIT: "748a4d3",
  BOARD: "ESP32",
  FLASH: 0, RAM: 524288,
  SERIAL: "807d3ac7-1f04",
  CONSOLE: "Serial1",
  MODULES: "Flash,Storage,hea" ... "r,crypto,neopixel",
  EXPTR: 1073484864 }
>ESP32.getState();
={
  sdkVersion: "v3.1",
  freeHeap: 37176, BLE: false, Wifi: true, minHeap: 34708 }

Build from source: git tag == RELEASE_2V01

File sizes:

   15392 abr 16 10:39 bootloader.bin
 1363648 abr 16 10:39 espruino_esp32.bin
    3072 abr 16 10:39 partitions_espruino.bin

Info from Espruino IDE:

>reset();
=undefined
WARNING: gap set scan error code = 103
WARNING: set rssi scan not implemeted yet
 ____                 _
|  __|___ ___ ___ _ _|_|___ ___
|  __|_ -| . |  _| | | |   | . |
|____|___|  _|_| |___|_|_|_|___|
         |_| espruino.com
 2v01 (c) 2018 G.Williams
Espruino is Open Source. Our work is supported
only by sales of official boards and donations:
http://espruino.com/Donate
>process.memory();
={ free: 2875, usage: 25, total: 2900, history: 0,
  gc: 0, gctime: 2.305 }
>process.env
={
  VERSION: "2v01",
  GIT_COMMIT: "748a4d37",
  BOARD: "ESP32",
  FLASH: 0, RAM: 524288,
  SERIAL: "807d3ac7-1f04",
  CONSOLE: "Serial1",
  MODULES: "Flash,Storage,hea" ... "r,crypto,neopixel",
  EXPTR: 1073484860 }
>ESP32.getState();
={
  sdkVersion: "v3.1.3-dirty",
  freeHeap: 36396, BLE: false, Wifi: true, minHeap: 34076 }
> 

I have a total of 2900 memory units in the custom build over the 4000 in the downloaded firmware (BLE is disabled). I think is a big difference for the same version (NOTE: The ESP32 toolchain used is xtensa-esp32-elf-linux64-1.22.0-73-ge28a011-5.2.0.tar.gz)

Anyone knows what could be the reason?

Thanks,
Jose.