gregtatum

Moved to: https://docs.google.com/document/d/1JnQZ-k63D2BN6-u8cZhqZzDsj1R7vKl9nWbHeDI4oeI/edit

Memory Tooling and JavaScript

Attendees:

• Greg Tatum
• Stephen Fink
• Jon Coppeard

The garbage collector in JavaScript does not use malloc to get its memory. It uses mmap on Unix systems (and another function on windows), similar to how jemalloc manages to get pages of memory. This bypasses the hooks.

gregtatum

const random = require('@tatumcreative/random')("3")
const simplex = new (require('simplex-noise'))(random)
const clamp = require('clamp')

const TAU = 6.283185307179586
const WIDTH = 400
const HEIGHT = 100
const COUNT = 300
const STEP = 4
const START_THETA = TAU * 0.75

gregtatum

//Utils.consoleMatrix( threeJsMatrix, 3 )
//Utils.consoleMatrix( threeJsMatrix )


var Utils = {
	
	consoleMatrix : function( matrix, decimalPlaces ) {

		var i, j, el, results;

gregtatum

// https://tcchd.maps.arcgis.com/apps/opsdashboard/index.html#/ebb119cd215b4c57933b7fbe477e7c30
// ​[fill="#ffaa00"]
// [aria-label="Cases Mar 23, 2020 23"]
const caseFill = "#ffaa00";

{
  const data = $$("[aria-label]")
    .filter(el => el.getAttribute("fill") === caseFill)
    .map(el => el.getAttribute("aria-label"))
    .map(label => label.match(/^Cases (\w+ \d+, \d+) (\d+)/))

gregtatum

diff --git a/mach b/mach
--- a/mach
+++ b/mach
@@ -83,19 +83,19 @@ py2commands="
 
 run_py() {
     # Try to run a specific Python interpreter. Fall back to the system
     # default Python if the specific interpreter couldn't be found.
     py_executable="$1"
     shift

gregtatum

import cProfile, pstats, StringIO, pdb, json

def func_a(n, l):
    if (n > l / 2):
        return func_b(n)
    else:
        return func_c(n)


def func_b(n):

gregtatum

diff --git a/src/components/stack-chart/Canvas.js b/src/components/stack-chart/Canvas.js
index c7d71e30..a5a1fe0b 100644
--- a/src/components/stack-chart/Canvas.js
+++ b/src/components/stack-chart/Canvas.js
@@ -420,8 +420,14 @@ class StackChartCanvas extends React.PureComponent<Props> {
 
     const stackTiming = stackTimingByDepth[depth];
 
-    if (!stackTiming.callNode) {
-      return null;

gregtatum

diff --git a/src/components/stack-chart/Canvas.js b/src/components/stack-chart/Canvas.js
index 808669c7..8a29aee8 100644
--- a/src/components/stack-chart/Canvas.js
+++ b/src/components/stack-chart/Canvas.js
@@ -20,6 +20,7 @@ import TextMeasurement from '../../utils/text-measurement';
 import { formatMilliseconds } from '../../utils/format-numbers';
 import { updatePreviewSelection } from '../../actions/profile-view';
 import { mapCategoryColorNameToStackChartStyles } from '../../utils/colors';
+// Add TooltipMarker
 import { TooltipCallNode } from '../tooltip/CallNode';

gregtatum

diff --git a/src/components/app/UrlManager.js b/src/components/app/UrlManager.js
index 6c12908a..82d7e868 100644
--- a/src/components/app/UrlManager.js
+++ b/src/components/app/UrlManager.js
@@ -8,7 +8,11 @@ import * as React from 'react';
 import explicitConnect from '../../utils/connect';
 import { getIsUrlSetupDone } from '../../selectors/app';
 import { updateUrlState, urlSetupDone, show404 } from '../../actions/app';
-import { urlFromState, stateFromLocation } from '../../app-logic/url-handling';
+import {

gregtatum

diff --git a/dom/performance/Performance.cpp b/dom/performance/Performance.cpp
--- a/dom/performance/Performance.cpp
+++ b/dom/performance/Performance.cpp
@@ -215,20 +215,68 @@ void Performance::Mark(const nsAString& 
   }
 
   RefPtr<PerformanceMark> performanceMark =
       new PerformanceMark(GetParentObject(), aName, Now());
   InsertUserEntry(performanceMark);