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Description
Nim Version
Nim Compiler Version 2.2.4 [Linux: amd64]
Compiled at 2025-04-22
Copyright (c) 2006-2025 by Andreas Rumpf
git hash: f7145dd
active boot switches: -d:release
Description
The following example program just appends objects to a sequence. When checking the amount of occupied memory by calling getOccupiedMem it always returns 0 byte even if gigabytes have been allocated. Strangely when using --mm:refc the problem doesn't occur.
Example code
import std/[strutils, strformat]
type
Obj = object of RootObj
name: string
var l = newSeq[Obj]()
var i = 0
while true:
var t: Obj = Obj(name: fmt"object #{i}")
l.add(t)
i.inc
if i mod 10_0000 == 0:
echo $i & ": occupied mem " & $formatSize(getOccupiedMem())
# ...
# 4200000: Occupied mem 0B
# 4300000: Occupied mem 0B
# 4400000: Occupied mem 0B
# 4500000: Occupied mem 0B
# 4600000: Occupied mem 0B
# ...Current Output
318867: occupied mem 0B
318868: occupied mem 0B
318869: occupied mem 0B
318870: occupied mem 0B
318871: occupied mem 0B
318872: occupied mem 0B
318873: occupied mem 0B
318874: occupied mem 0B
318875: occupied mem 0B
318876: occupied mem 0B
318877: occupied mem 0B
318878: occupied mem 0B
318879: occupied mem 0B
318880: occupied mem 0B
Expected Output
62287: occupied mem 3.952MiB
62288: occupied mem 3.953MiB
62289: occupied mem 3.954MiB
62290: occupied mem 3.954MiB
62291: occupied mem 3.955MiB
62292: occupied mem 3.956MiB
62293: occupied mem 3.957MiB
62294: occupied mem 3.957MiB
62295: occupied mem 3.958MiB
62296: occupied mem 3.959MiB
Known Workarounds
No response
Additional Information
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