gistfile1.py

import gc
import sys

import llvm.core as lc
import llvm.ee as le


# Cache plausible return values for sys.getallocatedblocks() - _base, to avoid
# allocating them later.
_int_pool = {}

for i in range(-2048, 2048):
    _int_pool[i] = i
del i

NITERS = 100

alloc = [0] * NITERS

gc.collect()
_base = sys.getallocatedblocks()

for i in range(NITERS):
    mod = lc.Module.new("foobar")
    if 1:
        eb = le.EngineBuilder.new(mod)
        eb.opt(3)
    eb = mod = None
    gc.collect()
    alloc[i] = _int_pool[sys.getallocatedblocks() - _base]

print("alloc =", alloc)
print("deltas =", [b - a for (a, b) in zip(alloc, alloc[1:])])