dkorolev

// To run: `g++ -O3 calc.cc && ./a.out`.
// Example values to run on are commented out in lines 8..10.

#include <cmath>
#include <iostream>
#include <iomanip>

long double const range = std::pow(2.0, 64);  // std::pow(1.0, 32);  // 1e6;
long double const desired_p_of_collision = 0.01;  // 1e-5;  1e-2;  // 0.5;
long double const desired_log_p = logl(1.0 - desired_p_of_collision);

dkorolev

let function_bodies = {};
let plans = {};
const opa_builtins = {
  plus: (args) => { return { t: 'number', v: args[0].v + args[1].v }; },
  minus: (args) => { return { t: 'number', v: args[0].v - args[1].v }; },
  mul: (args) => { return { t: 'number', v: args[0].v * args[1].v }; },
  numbers: {
    range: (args) => {
      let v = [];
      for (let i = args[0].v; i <= args[1].v; ++i) {

dkorolev

{
  "static": {
    "strings": [
      {
        "value": "result"
      },
      {
        "value": "a"
      },
      {

dkorolev

al = 0
si = 0x500
ram[si] = al
++si;
++al;
ram[si] = al
cx = ram[0]
cx -= 2;
while (cx) {
  al = ram[si - 1]

dkorolev

N = 8;
ram = [];
for (let i = 0; i < N; ++i) {
  ram[0x500 + i] = 0;
}
ram[0] = N;

al = 0
si = 0x500
ram[si] = al

dkorolev

digraph test_setup {
  rankdir = LR;
  node [ shape = cylinder; label = "DB" ];
  db_indexer;
  db_forwarder;
  node [ shape = box3d ];
  { rank = same; indexer; db_indexer; }
  { rank = same; forwarder; db_forwarder; }
  generator [ label = "Generator"; ];
  indexer [ label = "Indexer"; ];

dkorolev

digraph test_setup {
  rankdir = LR;
  node [ shape = cylinder; label = "DB" ];
  db_indexer;
  db1; db11; db12; db2; db21; db22; db3; db4; db5;
  node [ shape = box3d ];
  { rank = same; indexer; db_indexer; }
  source1 [ label = "Generator A"; ];
  source2 [ label = "Generator B"; ];
  source3 [ label = "RSocket Wrapper"; ];

dkorolev

dima@dima-x1:~/github/dkorolev/current/examples/datafest_talk/tier2_rides_by_months@unstable $ cat step5_rides_by_months_unoptimized.c 
// To run: gcc -O3 step5_rides_by_months_unoptimized.c && time ./a.out | tee >(md5sum)
// 
// Count rides by month, print the counters in the lexicographically sorted order of keys.
// The "canonical C" implementation, with no extra checks, unsafe in a few ways, but still only 2x slower than `wc -l`.

#include <stdio.h>

int MM[12];

dkorolev

#include <stdio.h>
#include <string.h>
#include <time.h>

int parse(const char* timestamp_as_string) {
  struct tm struct_tm;
  time_t t;
  memset(&struct_tm, 0, sizeof(struct tm));
  if (strptime(timestamp_as_string, "%m/%d/%Y %H:%M", &struct_tm)) {
    printf("strptime() returned `%d/%02d/%02d %02d:%02d:%02d; is_dst = %d`, ",

dkorolev

#include <stdio.h>
#include <string.h>
#include <time.h>

int parse(const char* timestamp_as_string) {
  struct tm struct_tm;
  time_t t;
  memset(&struct_tm, 0, sizeof(struct tm));
  if (strptime(timestamp_as_string, "%m/%d/%Y %H:%M", &struct_tm)) {
    struct_tm.tm_isdst = -1;