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@bcobb
bcobb / cons-car-cdr.swift
Last active June 18, 2021 12:18
SICP cons/car/cdr in Swift
enum ConsPosition {
case Left, Right
}
func cons<T>(a: T, b: T) -> (ConsPosition -> T) {
func innerCons(i: ConsPosition) -> T {
if i == .Left {
return a;
} else {
return b;
@totherik
totherik / gist:3a4432f26eea1224ceeb
Last active March 15, 2025 06:06
v8 --allow-natives-syntax RuntimeFunctions
Per https://code.google.com/p/v8/codesearch#v8/trunk/src/runtime.cc
%CreateSymbol
%CreatePrivateSymbol
%CreateGlobalPrivateSymbol
%NewSymbolWrapper
%SymbolDescription
%SymbolRegistry
%SymbolIsPrivate
; ___ _ __ ___ __ ___
; / __|_ _ __ _| |_____ / /| __|/ \_ )
; \__ \ ' \/ _` | / / -_) _ \__ \ () / /
; |___/_||_\__,_|_\_\___\___/___/\__/___|
; An annotated version of the snake example from Nick Morgan's 6502 assembly tutorial
; on http://skilldrick.github.io/easy6502/ that I created as an exercise for myself
; to learn a little bit about assembly. I **think** I understood everything, but I may
; also be completely wrong :-)
@rxaviers
rxaviers / gist:7360908
Last active July 5, 2025 07:16
Complete list of github markdown emoji markup

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@jboner
jboner / latency.txt
Last active July 2, 2025 06:46
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