How to compress esp32 bin files before flashing it through other chip

[Rosen_BK]

Hello! Im currently follow the example at https://github.com/espressif/esp-serial-flasher. And if Possible i want to know how to compress my .bins (firmware, bootloader, partition table) before flashing it. I saw log on Eclipse IDE saying that esptool compressed the bin files before flashing them to ESP32.
Im new to esp universe and im not experienced at all in embedded, so detailed explanation would be appreciated.

[ESP_Sprite]

I don't think it's included in that project, but you could try to hack it in. Effectively, the loader flashes chunks of flash using FLASH_BEGIN/FLASH_DATA/FLASH_END commands. To flash compressed data, you take the chunk you want to send, compress it using zlib deflate, then use FLASH_DEFL_BEGIN/FLASH_DEFL_DATA/FLASH_DEFL_END commands to send it. Note that all this only works on ESP32-type chips, the ESP8266 ROM does not have the logic for this (and esp-serial-flasher does not have a stub to add it in.)