| 0. SSH to server | |
| 1. Edit /opt/bitnami/apps/jenkins/jenkins_home/config.xml | |
| 2. set userSecurity to false: <userSecurity>false</userSecurity> | |
| 3. delete | |
| <authorizationStrategy> and <securityRealm> | |
| 4. /etc/init.d/bitnami restart |
| Latency Comparison Numbers (~2012) | |
| ---------------------------------- | |
| L1 cache reference 0.5 ns | |
| Branch mispredict 5 ns | |
| L2 cache reference 7 ns 14x L1 cache | |
| Mutex lock/unlock 25 ns | |
| Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
| Compress 1K bytes with Zippy 3,000 ns 3 us | |
| Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
| Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |
| class Product(models.Model): | |
| # other fields | |
| image = models.FileField(storage = MogileFSStorage(), upload_to = 'product_images') | |
| from django.core.files import File | |
| from django.core.files.temp import NamedTemporaryFile | |
| product = Product() | |
| # set all your variables here | |
| product.save() |
Inspired by this article. Neat tricks for speeding up integer computations.
Note: cin.sync_with_stdio(false); disables synchronous IO and gives you a performance boost.
If used, you should only use cin for reading input
(don't use both cin and scanf when sync is disabled, for example)
or you will get unexpected results.
x = x << 1; // x = x * 2
| #!/usr/bin/env python | |
| """ | |
| ===================================== | |
| PEP 20 (The Zen of Python) by example | |
| ===================================== | |
| Usage: %prog | |
| :Author: Hunter Blanks, hblanks@artifex.org / hblanks@monetate.com |
Using Python's built-in defaultdict we can easily define a tree data structure:
def tree(): return defaultdict(tree)That's it!
| import unittest | |
| class TestProblem(unittest.TestCase): | |
| def test_sample(self): | |
| self.assertEqual(1, 1) | |
| if __name__ == '__main__': | |
| unittest.main() |