Last active
October 29, 2017 09:25
-
-
Save pawl/c3ed7663b94abec01d75 to your computer and use it in GitHub Desktop.
Trying to figure out how to release a large dictionary from memory...
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
import random | |
import optparse | |
import gc | |
from flask import redirect, Flask | |
from memory_profiler import memory_usage | |
# Create flask app | |
app = Flask(__name__) | |
app.debug = True | |
@app.route('/') | |
def hello_world(): | |
### | |
# The test: | |
# Generate a 2440 mb dictionary and return a blank page. | |
### | |
large_dict = {} | |
for x in xrange(125000): | |
large_row = {} | |
for y in xrange(125): | |
large_row[random.randint(1, 10000000000)] = random.randint(1, 10000000000) | |
large_dict[random.randint(1, 10000000000)] = large_row | |
large_dict = {} | |
gc.collect() | |
return '' | |
@app.after_request | |
def after(response): | |
print memory_usage(-1, interval=.2, timeout=1), "after request" | |
return response | |
def main(): | |
app.config['SECRET_KEY'] = "BLAH" | |
parser = optparse.OptionParser() | |
parser.add_option("--host", default="0.0.0.0") # can't use -h, it's already taken by help | |
parser.add_option("-p", "--port", default="5123") | |
options, args = parser.parse_args() | |
if len(args) > 0: | |
parser.error("Unexpected arguments: %s" % args) | |
app.run(host=options.host, port=int(options.port)) | |
if __name__ == '__main__': | |
# Start app | |
main() |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
import random | |
import gc | |
from memory_profiler import memory_usage | |
large_dict = {} | |
for x in xrange(50000): | |
large_row = {} | |
for y in xrange(125): | |
large_row[random.randint(1, 10000000000)] = random.randint(1, 10000000000) | |
large_dict[random.randint(1, 10000000000)] = large_row | |
large_dict = {} | |
del large_dict | |
gc.collect() | |
print memory_usage(-1, interval=.2, timeout=1), "after gc.collect()" |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
import random | |
import gc | |
import time | |
large_dict = {} | |
for x in xrange(50000): | |
large_row = {} | |
for y in xrange(125): | |
large_row[random.randint(1, 10000000000)] = random.randint(1, 10000000000) | |
large_dict[random.randint(1, 10000000000)] = large_row | |
# Force a sweep | |
large_dict = {} | |
del large_dict | |
gc.collect() | |
time.sleep(55000) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment