What can be the maximum byte size for zip_fread() ?

[Purushoth24051999]

I use below function to read what can be the optimal maximum values for nbytes parameter

zip_int64_t zip_fread(zip_file_t *file, void *buf, zip_uint64_t nbytes);

Right now I have passed 64 kb as its value

auto length = zip_fread(filepath, buffer, 65536);`

[dillof]

The maximum that libzip supports is INT64_MAX (9223372036854775807), which is more than your system has available memory.

The optimum depends on your application. Larger values have less overhead since you're calling zip_fread() less often but use more memory and may not fit into caches and thus lead to slower memory accesses.

64k seems like a good compromise.