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This is the Dev Log about PerfAnalytics project!
This documentation keeps my research and ideas.
Written by @hasantezcan

DAY 1 - 03 July 2021

1. Measuring Web Performance in 2021: The Definitive Guide (BLOG)

https://requestmetrics.com/web-performance/measure-web-performance

The Core Web Vitals

You can reach whole value with this API.

2. Measure performance with the RAIL model! What is the RAIL model that?

https://web.dev/rail/

User-centric performance model. We care about humans and design the sites for humans. So we set the performance values according to humans react while building websites. RAIL name comes from Response, Animation, Idle, Load

!NOTE: The important thing; the response times table shows us How the human being reacts to the latency!
!NOTE: Human react can be variable according to device or internet connection value.

3. Analyze runtime performance

https://developer.chrome.com/docs/devtools/evaluate-performance/

  • In this articale your will learn how to use performance tab in chrome dev tools

4. Optimize website speed

https://developer.chrome.com/docs/devtools/speed/get-started/

  • In this article you will learn the basic of performance terms and basic usage!

DAY 2 - 04 July 2021

❓ Question: Can I use directly the web vitals package to get performance parameters?

⁉️ ISSUE: I have an issue with the web vitals package console logs. Did not shows on the console. They are coming as a second and disappears immediately!

<script src="https://unpkg.com/web-vitals/dist/web-vitals.iife.js"></script>
  <script>
    const { getCLS, getFID, getLCP, getTTFB } = webVitals;
    getCLS(console.log);
    getFID(console.log);
    getLCP((metric) => {
      console.log("test");
      console.log(`getLCP metric`, metric.value);
    });

    getTTFB((metric) => {
      // Calculate the request time by subtracting from TTFB
      // everything that happened prior to the request starting.
      const requestTime = metric.value - metric.entries[0].requestStart;
      console.log("Request time:", requestTime);
    });
  </script>

⁉️ ISSUE: - The TTFB value show like a TTFB time: 2.9349999967962503 - but my manual value is Manual TTFB time: 1

I want like a web vitals TTFB value!

✅ SOLVED: with the performance.getEntriesByType()

Inspired from here

✍️ NOTE: I found an API named PerformanceNavigationTiming but this is not working. I think the reason was not working may be that feature is still being Experimental feature.

⁉️ ISSUE: What is the DOM load value? I calculated as 0 or 500ms. I have to learn it!

🌟 Usefull paper: Reading performance data with JavaScript.

  • This blog post gives essancial information about Performance API v1 and Performance API v2

🖖 Day summary:

  • The performance information that I need is almost ready.
  • I am not sure about some values validation but I am working on it.
  • I decided to move on google sheets and google scripts while building API.

DAY 3 - 05 July 2021

I have just started to build API with nodejs and MongoDB. Why I didn't continue with google sheets and google scripts because I realized I couldn't have an opportunity to test my code and also I build the whole API side to the Cloud therefore I can't commit my changes in this repository. Maybe that was a cool idea but for this case, I will stay with nodeJs and mongo DB.

🖖 Day summary:

  • Refactored whole project directories
  • Started to the API with NodeJs and Mongo DB

DAY 4 - 06 July 2021

Yesterday I started to build API with JS but after that, I thought I can go with typescript. I spend a little resource time learning usage typescript on the server-side. And voilà! 🎉 I created the metrics post request today. From now on, I will connect the nodejs package with API.

🖖 Day summary:

  • Rebuild api with typescript
  • Build post api/metrics endpoint
  • Connect API with Mongo DB

DAY 5 - 07 July 2021

Today I connected PerfAnalytics JS with PerfAnalytics API. Also made some improvements PerfAnalytics JS side.

DAY 9 - 11 July 2021

Today I start to build PerfAnalytics.Dashboard with react-typescript.

I will move on with antDesign for fast development.

Which graph chart ?
I made a little search for decided which one is best option for me.

I found couple of blog post about that topic.[0]

I liked chartjs but this has not a React support. Actually, it was but now deprecated.

So I decided to move on with the other option "recharts"

❓ Question: What is uv, pv, amt?

{name: 'Page A', uv: 400, pv: 2400, amt: 2400}

I see these values inside of the reCharts graph data.

Q: What is uv and pv? #171 Q: What is the 'amt' property being used in all example data sets ? #467

amt = amount
pv = PageView
uv = UniqueVisitor

15 July 2021

Time synchronization with ISO 8601

My database metrics recored with this format

  createdAt: 2021-07-15T07:16:27.715+00:00
  updatedAt: 2021-07-15T07:16:27.715+00:00

When this metrics is recored db my local time is 10:16. Mongo db use global timze zone gmt 000 or you can say utc

And this format name is ISO 8601

    // Current local timestampt with vanillaJs
    const start = new Date(`${date} ${startTime}`).getTime()
    const end = new Date(`${date} ${endTime}`).getTime()

    // Current local timestampt with momentJs
    const end = moment(`${date} ${startTime}`).format("x")
    const end = moment(`${date} ${endTime}`).format("x")

    // Create ISO 8601 time format with momentJs
    const start = moment(`${date} ${startTime}`).toISOString()
    const end = moment(`${date} ${endTime}`).toISOString()

    // Create ISO 8601 time format with vanillaJS
    new Date().toISOString() // "2017-08-26T16:31:02.349Z"

Source :

How do I format a date as ISO 8601 in moment.js?

Generating a color from a hash(string)

https://github.com/zenozeng/color-hash

  • Not worked

https://stackoverflow.com/a/16348977/10694425

Setup a Nodejs TypeScript build settings

https://khalilstemmler.com/blogs/typescript/node-starter-project/#Create-a-tsconfigjson

Serve PerfAnalytics JS from API

🤔 All project inside in one repository

TrendyolCase-HasanTezcan (REPO)
- PerfAnalytics.API
- PerfAnalytics.Dashboard
- PerfAnalytics.Js

All projects inside in one repo! How can I handle that? Is that the proper way to work like that? While I developing this application sometimes I thought "I need a fresh new paper" just like a quiz in university. :)

Github Actions

⁉️ ISSUE: reChart Multiline issue

When shown two lines the graph is dividing into two! And shows empty half of it!

✅ SOLVED: Solved with this resource: recharts/recharts#956

16 July 2021

Update windowLoad time measure method with this approach.

17 July 2021

18 July 2021

I move subprojects to separate repositories created by mine. In the main repository given by Trendyol, I don't have any access to add secret keys so I cant build GitHub actions in a proper way.

I created 3 repositories for API, Web Client, and JS package with my whole commit history.

After that, every single sub-project will maintain from its own repository.

Deploying a React App Using GitHub Pages and GitHub Actions

https://codeburst.io/deploying-a-react-app-using-github-pages-and-github-actions-7fc14d380796