Merging two hash maps seems like an O(N) operation. However, while merging millions of keys, I encountered a massive >10x performance degradation unexpectedly. This post explores why some of the most popular libraries fall into this trap and how to fix it. The source code is available here.
Michael Burman burmanm
attractivechaos
/ 2026-01-01_hashmap-merge.md
Last active
March 16, 2026 15:51
linar-jether
/ simple_python_datasource.py
Last active
September 2, 2025 16:44
Grafana python datasource - using pandas for timeseries and table data. inspired by and compatible with the simple json datasource ---- Up-to-date version maintained @ https://github.com/panodata/grafana-pandas-datasource
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| from flask import Flask, request, jsonify, json, abort | |
| from flask_cors import CORS, cross_origin | |
| import pandas as pd | |
| app = Flask(__name__) | |
| cors = CORS(app) | |
| app.config['CORS_HEADERS'] = 'Content-Type' |
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| # 0 is too far from ` ;) | |
| set -g base-index 1 | |
| # Automatically set window title | |
| set-window-option -g automatic-rename on | |
| set-option -g set-titles on | |
| #set -g default-terminal screen-256color | |
| set -g status-keys vi | |
| set -g history-limit 10000 |