Is there a way to pre-allocate memory? v7

[gavinunderdown]

With library version 7, is there a way to pre-allocate memory?

I have a large amount of data (80kb raw size in memory) that I want to serialize to an array
"CaptureDataParams": [ [ 305, -2756, 3074.97998, 2130792586, 2130792586, 2047 ], [ 306, -2786, 3075.919922, 2130792278, 2130792278, 2047 ], [ 307, -2816, 3076.530029, 2130791970, 2130791970, 2047 ], ...

I have 5000 of these items, and at least in memory they are a fixed size.

Is there a way to pre-allocate the memory for the nested arrays, such that for each iteration I only have to end up calling malloc() 2-3 times?

[bblanchon]

Hi @gavinunderdown,

With library version 7, is there a way to pre-allocate memory?

No, ArduinoJson 7 doesn't let you preallocate the memory for the array.

I have 5000 of these items, and at least in memory they are a fixed size.

JSON isn't a good fit for your data; you should use a good ol' binary format.

Best regards,
Benoit