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jboner / latency.txt
Last active November 15, 2024 14:00
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
{ config, lib, ... }:
with lib;
let
cfg = config.services.nixBinaryCacheCache;
nginxCfg = config.services.nginx;
import chisel3.util.log2Ceil
import chisel3.experimental.EnumAnnotations.{EnumComponentAnnotation, EnumVecAnnotation, EnumDefAnnotation}
import firrtl.{CircuitState, DependencyAPIMigration, Transform}
import firrtl.options.TargetDirAnnotation
import firrtl.stage.{Forms, RunFirrtlTransformAnnotation}
import firrtl.analyses.InstanceKeyGraph
import firrtl.ir.{GroundType, SIntType, IntWidth, Port}
import chiseltest.internal.{VerilatorBackendAnnotation, WriteVcdAnnotation}
import logger.LazyLogging
@sekcompsci
sekcompsci / Comparison Espressif ESP MCUs.md
Last active November 15, 2024 03:20 — forked from fabianoriccardi/Comparison Espressif ESP MCUs.md
Comparison chips (SoCs) table for ESP8266/ESP32/ESP32-S2/ESP32-S3/ESP32-C3/ESP32-C6. Forked from @fabianoriccardi

Comparison chips (SoCs) table for ESP8266/ESP32/ESP32-S2/ESP32-S3/ESP32-C3/ESP32-C6

A minimal table to compare the Espressif's MCU families.

ESP8266 ESP32 ESP32-S2 ESP32-S3 ESP32-C3 ESP32-C6
Announcement Date 2014, August 2016, September 2019, September 2020, December