ESP32 memory allocation

[PeterR]

I have add memory diagnostocs to my application so that I may check for leaks/fragmentation.

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heap_caps_get_info()

and requesting capabilities:

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MALLOC_CAP_8BIT,   MALLOC_CAP_EXEC,   MALLOC_CAP_SPIRAM

I am suprised to see that I have MALLOC_CAP_EXEC 214,660 bytes free.
make -j8 size-components reports that the flash code size is >> 500,000.

What exactly is MALLOC_CAP_EXEC & how is it allocated to my program ?
I guess that MALLOC_CAP_EXEC is SRAM0 (192K), SRAM1(128K) but after cache I would have 256K maximum.
Why then do I have 214K MALLOC_CAP_EXEC free when my program is much larger?

[WiFive]

Most of the code is not persistently loaded to IRAM, it executes "in place" through an on-demand cache