#!/bin/bash
CACHE_FILE="/tmp/bandwidth.cache"

# Primary bar updates the cache
if [ -n "$I3BLOCKS_PRIMARY" ]; then
    ~/.config/i3blocks/bandwidth/bandwidth > "$CACHE_FILE" 2>/dev/null
fi

# Both bars show from cache
if [ -f "$CACHE_FILE" ]; then
    sleep 0.1 && cat "$CACHE_FILE"
else
    echo "↓0 ↑0"
fi