asvanberg

return (function () {

  // Price must be this percentage of resting value to buy during slow climb
  const slowClimbBuyThreshhold = 0.50;
  // Sell when stable this close to market ceiling
  const stableSellThreshhold = 0.96;
  // Price must be this percentage of resting value to buy during fast climb
  const fastClimbBuyThreshhold = 100.0;

  const numberFormat = new Intl.NumberFormat([], { 'style': 'currency', 'currency': 'USD' });

asvanberg

package io.github.asvanberg.http.webpush;

import javax.crypto.Cipher;
import javax.crypto.KeyAgreement;
import javax.crypto.Mac;
import javax.crypto.spec.GCMParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.nio.ByteBuffer;
import java.security.GeneralSecurityException;
import java.security.KeyPair;

asvanberg

Zipkin query optimization

Test setup

• MariaDB (10.1.23-MariaDB-9+deb9u1)
• Virtual server (2.5Ghz single core, 3GB RAM)
• 701,241 spans
• 3,508,959 annotations

Queries

asvanberg

-- original
SELECT DISTINCT
    `zipkin_spans`.`trace_id_high`,
    `zipkin_spans`.`trace_id`,
    MAX(`zipkin_spans`.`start_ts`)
FROM
    `zipkin_spans`
        JOIN
    `zipkin_annotations` ON (`zipkin_spans`.`trace_id_high` = `zipkin_annotations`.`trace_id_high`
        AND `zipkin_spans`.`trace_id` = `zipkin_annotations`.`trace_id`

asvanberg

lazy val concatCoffeeScript = taskKey[Seq[File]]("Concatenate .coffee")
lazy val concatCoffeeScriptFiles = settingKey[Seq[(String, Seq[String])]]("Files to concatenate, in order")

concatCoffeeScriptFiles := Seq(
  "javascripts/app.coffee" → Seq("javascripts/product.coffee", "javascripts/person.coffee", "javascripts/main.coffee")
)

concatCoffeeScript <<= (sourceDirectory in Assets, concatCoffeeScriptFiles, WebKeys.webTarget) map { (d, fs, t) ⇒
  fs map { case (concatenated, parts) ⇒
      val cf = t / concatenated