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if sysbench.cmdline.command == nil then
error("Command is required. Supported commands: run")
end
sysbench.cmdline.options = {
point_selects = {"Number of point SELECT queries to run", 5},
skip_trx = {"Do not use BEGIN/COMMIT; Use global auto_commit value", false}
}
local page_types = { "actor", "character", "movie" }
@mannodermaus
mannodermaus / BaseAdapter.java
Last active June 14, 2023 14:24
RecyclerView.ViewHolder and Adapter demonstration
public abstract class BaseAdapter<T, VH extends BaseViewHolder<T>> extends RecyclerView.Adapter<VH> {
private List<T> items;
// Missing: setItems(), addItem(), removeItem(), ...
@Override
public final void onBindViewHolder(VH vh, int position) {
T item = items.get(position);
vh.performBind(item, position);
@mblondel
mblondel / kernel_kmeans.py
Last active January 4, 2024 11:45
Kernel K-means.
"""Kernel K-means"""
# Author: Mathieu Blondel <mathieu@mblondel.org>
# License: BSD 3 clause
import numpy as np
from sklearn.base import BaseEstimator, ClusterMixin
from sklearn.metrics.pairwise import pairwise_kernels
from sklearn.utils import check_random_state
@jboner
jboner / latency.txt
Last active July 23, 2024 07:56
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