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@guilleferrer
guilleferrer / Date Range Mongo Query
Created January 24, 2012 11:50
Query for a date range using Mongo Timestamps
db.Collection.find({
created_at : {
'$gte': new Timestamp(new Date(2012, 0, 21), 0),
'$lte': new Timestamp(new Date(2012, 0, 22), 0)
})
@jboner
jboner / latency.txt
Last active July 24, 2024 15:26
Latency Numbers Every Programmer Should Know
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
INSTALLED_APPS = (
'modeltranslation',
'djangocms_admin_style', # for the admin skin. You **must** add 'djangocms_admin_style' in the list **before** 'django.contrib.admin'.
# Boostrap admin theme
# 'django_admin_bootstrapped.bootstrap3',
# 'django_admin_bootstrapped',
# Apps bundled with Django