kvakvs

%%% @doc Calling start() on the socket problem will create a socket client
%%% which will create 100 connections to an echo server (in separate file) and
%%% load them in an uneven random manner.
%%% Find the most busy one.
-module(socket_problem).

%% API
-export([start/0]).

-define(CONNECT_PORT, 11111).

kvakvs

%%% @doc Calling start() will create an echo socket server which will do nothing
%%% but echo the incoming data till it disconnects.
%%% See socket_problem.erl for the problem description.
-module(socket_problem_server).

-export([start/0, server/1, handle_messages/1]).

-define(LISTEN_PORT, 11111).

start() ->

kvakvs

%%%-------------------------------------------------------------------
%%% @copyright (C) 2020, Erlang Solutions Ltd.
%%% @doc Create a long running process which consumes CPU periodically
%%% @end
%%%-------------------------------------------------------------------
-module(problem_cpu).

%% API
-export([start/0]).

kvakvs

defmodule BeamWorkshop do
  def start() do
    spawn(&process_loop/0)
  end

  def process_loop() do
    big_data =
      for _ <- 1..1024 do
        big_data(1_048_576)
      end

kvakvs

%%%-------------------------------------------------------------------
%%% @copyright (C) 2020, Erlang Solutions Ltd.
%%% @doc Create a long running process which consumes 1 GB of memory
%%% @end
%%%-------------------------------------------------------------------
-module(problem_mem).

%% API
-export([start/0]).

kvakvs

Achieving warp speed with Rust

Contents:

• Number one optimization tip: don't
• Never optimize blindly
• Don't bother optimizing one-time costs
• Improve your algorithms
• CPU architecture primer
• Keep as much as possible in cache
• Keep as much as possible in registers

kvakvs

int a;
abstract class PMItem { public bool Match(value) {return false;} }
class PMVar: extends PMItem { public Integer p; public bool Match() { // assign value to p; return true } }
class PM_: extends PMItem { public bool Match(_) { return true;}}
class Obj {
  public int a;
  public String x;
  public int zero;
  publie float zerof;
}

kvakvs

-module(otp13722).
-export([go/0]).
-compile(export_all).

flush() ->
    receive X -> io:format("received: ~p~n", [X]), flush()
    after 1000 -> ok
    end.

tr_apply(M, F, Args) ->

kvakvs

-module(fptr).
-export([main1/0, main2/0, main3/1, callable/1]).

main1() ->
    fun() -> fptr:callable(111) end.
main2() ->
    fun() -> erlang:apply(fptr, callable, [111]) end.
main3(M) ->
    fun() -> erlang:apply(M, callable, [111]) end.

kvakvs

-module(otp13722).
-export([main/1]).

flush() ->
    receive X -> io:format("received: ~p~n", [X]), flush()
    after 1000 -> ok
    end.

tr1(M, F, Args) ->
    dbg:tracer(),