fix: save memory

[DinCahill]

Hi, thanks for making this script. I was looking at the code, and noticed that exe and exe_hex aren't being freed, so the script hogs a lot of memory while the game is running.

Before:

Fixed:

---

I used memory-profiler to do the following analysis:

Reading the exe takes up the expected 78.9MB, and the hex version is twice as big at 157.7MB.

    25     21.4 MiB      0.0 MiB           1       exe_name = Path("eldenring.exe")
    26    100.3 MiB      0.0 MiB           2       with open(exe_name, "rb") as f:
    27    100.3 MiB     78.9 MiB           1           exe = f.read()
    28    258.0 MiB    157.7 MiB           1       exe_hex = exe.hex()

The memory stays in use until the end of the script:

    81    258.1 MiB      0.0 MiB           1       os.rmdir(patched_exe_dir)

---

I made two changes:

• Create exe_hex directly to avoid allocating exe.

  25     21.3 MiB      0.0 MiB           1       exe_name = Path("eldenring.exe")
  26    179.0 MiB      0.0 MiB           2       with open(exe_name, "rb") as f:
  27    179.0 MiB    157.7 MiB           1           exe_hex = f.read().hex()

• Free exe_hex once it's no longer needed.

  71    179.0 MiB      0.0 MiB           2       with open(patched_exe_dir / exe_name, "wb") as f:
  72    179.0 MiB      0.0 MiB           1           f.write(bytes.fromhex(exe_hex))
  73
  74     21.3 MiB   -157.7 MiB           1       del exe_hex

  The alternative would be to put all the exe stuff inside a function, and exe_hex would get cleaned up when it goes out of scope.

[gurrgur]

Hey, thanks for the fix! Definitely makes sense to save some memory. I'll merge it right in :)