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@jboner
jboner / latency.txt
Last active July 24, 2024 19:52
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
@dkormalev
dkormalev / gist:3748554
Created September 19, 2012 08:59
Qt Notes Podcast s02e01 конкурс
Необходимо создать (на чистом QML или на QML с использованием C++) менеджер экранов,
аналогичный используемому в Android, MeeGo, Symbian, etc.
Ключевым отличием является использование грида, а не одномерного списка экранов.
То есть, например, мы можем создать сетку экранов 3x3, по которой будет перемещаться пользователь
(вверх-вниз-влево-вправо). Именно вниз-вверх-влево-вправо, по диагонали не надо.
В окне приложения всегда виден один экран,
при драге мышкой из любой точки экрана в одну из сторон -
переключаемся на другой экран (если он есть в гриде экранов конечно).
@region23
region23 / golang_books_sites.md
Last active July 18, 2024 08:27
Полезные ресурсы для изучающих Go

На русском языке

Русскоязычные сайты и сообщества

English resources

@jboner
jboner / ResilienceReferences.md
Last active June 30, 2024 13:44
References from my talk 'Without Resilience, Nothing Else Matters'.
@scottfrazer
scottfrazer / goscala.md
Last active November 2, 2023 20:47

Go vs. Scala (Akka) Concurrency

A comparison from 2 weeks using Go.

Actors vs. Functions

Akka's central principle is that there you have an ActorSystem which runs Actors. An Actor is defined as a class and it has a method to receive messages.

@garybernhardt
garybernhardt / types.markdown
Last active May 22, 2024 10:02

This document has moved!

It's now here, in The Programmer's Compendium. The content is the same as before, but being part of the compendium means that it's actively maintained.

@zsfelfoldi
zsfelfoldi / ulc.txt
Last active February 19, 2018 10:09
Here are some pointers to implementing the ULC mode. Just take a look at the relevant code, then feel free to ping me whenever you have questions (I guess it will happen a few times, I tried to document the most important parts but some of the code is still a bit messy, which I apologize for in advance).
- adding the ultra light client option:
Add an extra option for light client mode where the user can specify a text/json ULC config file that contains a list of trusted server enodes and N out of M parameters (which may depend on how many servers we are connected to, there may be 5 servers listed but we can still accept 2 out of 3 connected).
Geth parameters are implemented like this:
https://github.com/ethereum/go-ethereum/blob/master/cmd/utils/flags.go#L162
Search for LightModeFlag or LightServFlag to find out how it is wired through the code.
- requesting signed headers
@eanakashima
eanakashima / vizprog.md
Last active September 25, 2018 15:39
Whoa, Pictures! A Visual History of Visual Programming (2018): References
@mkevac
mkevac / gist:a4cb823a560c13c9bfe914c395666828
Created December 16, 2018 14:34
YouTube subscriptions
Science
----
15x4 Talks: https://www.youtube.com/channel/UCMAr-94KkdtiSqHoRJCPK1Q
3Blue1Brown: https://www.youtube.com/channel/UCYO_jab_esuFRV4b17AJtAw
minutephysics: https://www.youtube.com/channel/UCUHW94eEFW7hkUMVaZz4eDg
Real Engineering: https://www.youtube.com/channel/UCR1IuLEqb6UEA_zQ81kwXfg
SmarterEveryDay: https://www.youtube.com/channel/UC6107grRI4m0o2-emgoDnAA
Vihart: https://www.youtube.com/channel/UCOGeU-1Fig3rrDjhm9Zs_wg
Vsauce: https://www.youtube.com/channel/UC6nSFpj9HTCZ5t-N3Rm3-HA
@SkatingScores
SkatingScores / CoP_Critique_Sources.csv
Last active April 9, 2019 19:45
CoP/IJS Critique Sources
We can make this file beautiful and searchable if this error is corrected: It looks like row 6 should actually have 5 columns, instead of 4. in line 5.
Author,Date,Pub,Title,Link
Sandra Loosemoore,May 2003,Frogs On Ice,Code of Points Considered Harmful,http://www.frogsonice.com/skateweb/articles/code-of-points.shtml
Katherine Godfrey PhD,May 2003?,SkateFair.org,Statistical Consequences of the ISU's New Cumulative Scoring System,https://web.archive.org/web/20100131081126/http://www.skatefair.org/media/copanalysis.php
Eric Zitzewitz,06 Jan 2006,Journal of Economics and Management Strategy,Nationalism in Winter Sports Judgingand Its Lessons for OrganizationalDecision Making,https://onlinelibrary.wiley.com/doi/epdf/10.1111/j.1530-9134.2006.00092.x?referrer_access_token=Ivpkk0cEoXt8ZclKtWknKIta6bR2k8jH0KrdpFOxC65gKbkIAGZYRBVcC8hWgYQKvtKv8WnoGleJPgED3rAUMnMyjshQVd2xam8FrOsQxTpLXD9EiJnxir0SXcoZABBP3AZzyfsm3C69aVnQNClkfw%3D%3D
,16 Feb 2006,Seed Magazine,Finding Flaws in Figure Skating,https://web.archive.org/web/20120714095006/http://seedmagazine.com/content/article/finding_flaws_in_figure_skating/
John Emerson,Spring/Summer 2006?,Yale,The Computer: A Phantom Figure