Earth Notes : On Website Technicals Read nitty-gritty tech updates and daily learnings that keep the Earth Notes site up and running; site stats also.
All about the interesting (and mundane) behind-the-scenes tech bits and bobs to grow and optimise this site, including purely technical measures such as speed, but also user experience beyond just adding new articles and updating existing ones. Also often a little linkfest of interesting articles I have read, on a somewhat wider tech curriculum...
NEW: RSS feed
These notes will be updated intermittently, often when I should be working on something else!
Please try the useful tools, reasonably recently used and re-used by me, and encountered while writing these entries, listed under Sources/Links .
The Sources/Links section of each of the pages lists interesting and/or useful resources encountered, even if not directly used for the site, generally that month.
Also please take a look at the simple automatically-updated site stats below.
I welcome feedback on any of the issues that I have discussed. I share this stuff because it's interesting and because writing it here may save someone else some unnecessary head-scratching! No longer do we need to really know anything technical, nor own a shelf full of reference books (so '90s!), we just need to be able to compose queries for our favourite search engines!
The newest pages are at the top of this list, and the newest items are at the top of each linked page. Enjoy! Notes On Site Technicals: Index #90: 2024-11 bad expiry, new energy fields, optimisation. #89: 2024-10 304s rising, Vigor patch, CC BY, non-ASCII BibTeX. #88: 2024-09 anticipating the heat pump, BibTeX crossref, ETag cleanup, APFS defrag, Gallery traffic trim. #87: 2024-08 RSS lastBuildDate, crashes, NTP. #86: 2024-07 RPI3B again, 512GB found, MIDI albums, Referer no help, ConnectBot. #85: 2024-06 byte trimming, Googlebot still rogue, bot funnel, defence trimming, attacked, link saturation, slow winter, worst bots, DDoS. #84: 2024-05 RED 406 and 429, mod_dumpio, time hash, mod_log_forensic, Sec-CH-UA-Mobile, rate limit, NTP, feed diet, time series, rogue Googlebot. #83: 2024-04 ORCID, RSS work storage, podcast images, transcripts, Apache 2.4 ETag bug, 406 and more 429, less AMP, cacheing tweaks. #82: 2024-03 METERCHANGE, micro-optimisation, podcast WebVTT transcript, CORS, Opus 16kbps, 429, time cues, mp3L, auto dark mode, lite-only text. #81: 2024-02 intensity page tweak, new data source and JSON, toot lite, significantLink, square gCO2perkWh, series RSS, Mastodon preview a11y alt text. #80: 2024-01 data curation, sitemap ping gone, heating polling again, offline too eager, RPi upgrade, more citation, stampede DDoS. #79: 2023-12 ShellCheck, 503 work storage, Dataset citation glitch, 2024 already, video pages lost, ffmpeg, intensities, INTVKL. #78: 2023-11 GSC Dataset pickiness, Zenodo DOIs, microSDVC card prep and f3, CrowView, public data archive. #77: 2023-10 AdSense cookie GDPR, ill SD card, icons cache, stale data flag, BibDesk, biber, Overleaf, MacTeX, howpublished, winterising, deTwittering. #76: 2023-09 crashy, bandwidth, og:image, archivedAt, copyrightNotice, contentReferenceTime, cookie consent, immutable, RPi5, reutils. #75: 2023-08 INTVKL, static content URLs, code coverage, main pages archive, embargoes. #74: 2023-07 statsHouse generative music, bird dropping thus most pages no JS, dark mode autoselection. #73: 2023-06 heat, music. #72: 2023-05 bang, 512GB SD, one OS to run them all. #71: 2023-04 sonifying data to house, Apache and CC, awk function, TiMidity++, MIDI deflate, Ableton, Bitwig, LMMS, mild. #70: 2023-03 reducing storage writes from logging, slow random. #69: 2023-02 Apache scripts, FOSDEM energy and Java, GraalVM AOT. #68: 2023-01 energy stats, ASCII .bib, et al., toot from Java, undead, technically, ProGuard, Sendmail HELO, bib lite, date +h, 410. #67: 2022-12 citationID, Mastostorm, server down, mail system move, dataset archive, database cross-check, static Gallery, Xmas slump. #66: 2022-11 tooting for climate, WiFi dongle swap, a11y tagging, BibTeX bibliography. #65: 2022-10 SVG diagrams, spelling progress, title change, awl spelled rite, WebSite, Save-Data, GMT. #64: 2022-09 TX down, spelingg, bad words, structured data. #63: 2022-08 FUELINST glitch, review pros and cons, a11y, fanlife, Save-Data, traffic nadir, JXL. #62: 2022-07 hot, cross (references). #61: 2022-06 100% good page experience, conexDHW, Review.name, a11y, isAccessibleForFree, hunspell en_GB, throbber. #60: 2022-05 timing tweets, energy stats insert, explosion, defer/async again, Airogram, off-grid, lowpowermode, stats fiddling, synthesis. #59: 2022-04 grid support, GSC desktop crawl requests, HFS slow fsck, Air delay, new images. #58: 2022-03 jq, daylight bug not saving. #57: 2022-02 Eddi data and control, more not indexed, max immutable cache life. #56: 2022-01 sitemap timestamp changes, power system tweaks, RE Utils V1.1.12, Christmas dip, desktop page experience, not indexed. #55: 2021-12 Sitebulb 5.4.0 review, AMP off, reviewed reviewed, crawl frenzy, IndexNow. #54: 2021-11 more meters, reutils tweets upgrade, DB-based Event and Product schema.org. #53: 2021-10 crazy inexplicable GSC page experience. #52: 2021-09 crazy page experience, settling, Save-Data automatic lite pages. #51: 2021-08 improved cwebp, liter, lingering, Ko-fi, AVIF, boldness, JXL from JPEG, 304s?, rebuild speedup, AMP 0, keen img inline, repo move. #50: 2021-07 AMP be gone, going, HTTPS m-dot, WebP footling, AMP gone, WebP lo-fi, not much Save-Data, yak shaving, ate my hamster. #49: 2021-06 precise CSS minify, connection down, new series, down with AMP. #48: 2021-05 LIFX, JXL, previous-article teaser. #47: 2021-04 Ds are good, more tweets vicar?, Ds are fiddled with, moar, less, 2%, 2 brews, phone, MBA too, JXL, max green?, all zeroes. #46: 2021-03 DNS primary fun, fast site, build faster in the sun, new dump scheme, flaky router, bylines. #45: 2021-02 image preview tweak for dark mode, DNS secondary fun. #44: 2021-01 2022 data, min.js, hosting, soft params, profile opt, hot, storage, unLooped, looong fsck, uptime, dark tweaks, INTIFA2. #43: 2020-12 vignette ads, year-end to-dos, Big Sur and FTDI, half traffic, time travel, 20/20. #42: 2020-11 work storage, Let's Encrypt auto-renew, lazy wins, slow https switch, AMP https only, soft canonical, Apple touch, Apache stop, ad sub. #41: 2020-10 smaller than recommended, https 150ms slower, https Dataset canonical, Textract, ORCID, 1995. #40: 2020-09 Brotli side, AMP https preferred, H2 oddity, anchor ads away, forever compression, canonical https www, 92222[2], GSC domain property. #39: 2020-08 Review rework, CSS contain and large pages, AutoAds and floats, moar moves, reviews fixed, MODBUS et al, Brotli, FAQ droop. #38: 2020-07 micro-optimisation fun, mobile first, sizes is important, denser displays, MD5 names, AMP cert, m-dot move. #37: 2020-06 VIDEO/AUDIO style responsive tweaks, AutoAds on again, CSS trim, Ansible, desktop minify, throttle, pop star, HTTPS, HTTP/2, ADC, RPi speed. #36: 2020-05 lower-fi audio and video for AMP, hi-fi for hi-res screens, podcast RSS episode images, lazier heroes. #35: 2020-04 Blue Yeti, reduced media preload, download means download, 48kHz podcast, Zencastr, mono marker, GSC soft 404s, stats. #34: 2020-03 performance tweaks, aggressive lazy, ad load, coronavirus, even lazier. #33: 2020-02 GSC Review annoyance, CSS dark mode, video captions, lazy loading, srcset issues. #32: 2020-01 AdSense AutoAds and GSC speed oddities, newsflash snapshot, frugal. #hashtagMagic. #31: 2019-12 Dataset search and dateModified, not lazy yet, newsflash, ad shift, GSC page speed report implausible. #30: 2019-11 new Fairphone 3, MIDI data feed, GSC PageSpeed Insights, intensity log live, h3 tweak. #29: 2019-10 GSC enhancements, automating data archiving, podcast rash, PodcastEpisode, auto-abstract, Audacity transcript. #28: 2019-09 lack of instant podcast fame, .wav from awk, 5 per day, charge profile, explicitly not. #27: 2019-08 maybe lazy, spatial coverage and Google Maps, goodbye JSON, long path wrapped, podcasts, links out and left float. #26: 2019-07 improved video support, HTTPS, search impressions vs clicks, FFmpeg vs AVconv, line-height. #25: 2019-06 Google search favicon, loading=lazy, dateCreated for a few, podcast and other audio support, Audacity, video support. #24: 2019-05 displaying coverage, build too slow, ISO 8601 dates, GSC FAQ report, How-To, dated Comment, networking. #23: 2019-04 moar litererer, bumpy indexing, copyrightYear fix, Schedule, HH:MM and spatial page metadata, notworking, vox pop, tap target size. #22: 2019-03 403, 2xGZip, FAQPage mix-in, m-dot/AMP, embedded BlogPosting, representativeOfPage, AMP ImageObject, MachMetrics, HTTPS, DefinedTermSet. #21: 2019-02 micro-optimisation, isBasedOn, misuse of link rel prev/next, AMP half-indexed, Google-, soft 404, 1990 style, desktop tweak, 60% AMPed. #20: 2019-01 Happy New Ear, cssgip, work storage, AMP srcset, LEDs, details, 400kpx image warning, bad AutoAd, indigestion, multi-hero, OGP revisited. #19: 2018-12 feeds, IMG beyond AMP, Gallery CMS, test cases, random rebuild order, speakable structured data, lighter 404, moar AMPy, featured snippet. #18: 2018-11 shorter autogen-image path and hero weight limit, images and link rel for AMP, IMG alt and SVG. #17: 2018-10 preparing for the new RPi3 with 256GB of microSD card and BBR, app inventory, Bing crawl efficiency, info image and AMP. #16: 2018-09 data file Atom sitemap in robots.txt, Google Dataset Search, poetry, DataDownload, CC0 licence, About, AMP. #15: 2018-08 PWA revisited, auto lazy loading, jumpy AutoAds, more content pyramid, CRP and efficient canonicals, custom 404. #14: 2018-07 warming up to HTTP/2 and Brotli and HTTPS, and the rest. #13: 2018-06 creating a skim-friendly content pyramid, and post GDPR-calypse. #12: 2018-05 CSS box-shadow performance for mobile, dns-prefetch fail, micro-optimisations, GDPR. #11: 2018-04 reading time, jpegtran to jpegultrascan, Primitive, SVG, Save-Data, Sitebulb. #10: 2018-03 Auto Ad imbalance, incremental build, readability, tags, ad borders, TechArticle and Report, SoftwareSourceCode. #9: 2018-02 Bing head, a saved byte, boxed cols and rounded corners, Google AdSense Auto Ads. #8: 2018-01 PSNR lo-fi PNG autogeneration, page media, secondary image, client hints. #7: 2017-12 allegedly too little markup, bad traffic, big hero, base download ms, service worker no rel, jump-to. #6: 2017-11 Googlebot warp space, image re-optimisation, even liter, defer, inlining, video. #5: 2017-10 rounded corners, mobile usability, HTTP/2 vs mobile, bad bot, UnCSS tweaks, latency, unit tests, visuals, Save-Data header, lite vs mobile. #4: 2017-09 ImageMagick 20 years, Homebrew, autogen banners, old eyes, optimised ads, mobile traffic, brotli, doctype, JPEG, purifycss, UnCSS, OnDemand. #3: 2017-08 Atom sitemaps (un)pending, Googlebot bandwidth, HTML improvements, regex big beast hunting, heroes, Cache-Control, restart drill, minifying. #2: 2017-07 ad injection, meta, static precompression, zopfli, HTTP/head response overhead diet, Bing Webmaster Tools, FeedValidator, Share42, utf-8. #1: 2017-06 CDN revoked, structured data, 10 years old, XML sitemap at long last and lastmod, HTML5 conformance, PageSpeed. Site Stats Stats updated: 2024-11-20T10:22Z
Stat Value Fraction bot hits (target <0.5) 0.467 Fraction GET 200s 0.584 Fraction GET 206s 0.005 Fraction GET 301s 0.109 Fraction GET 302s 0.038 Fraction GET 304s 0.068 Fraction GET 400s 0.000 Fraction GET 403s 0.002 Fraction GET 404s 0.034 Fraction GET 406s 0.000 Fraction GET 410s 0.000 Fraction GET 416s 0.000 Fraction GET 503s 0.047 Fraction GETs 0.888 Fraction HEADs 0.021 Fraction HTTP hits 0.148 Fraction HTTPS hits 0.852 Fraction human main-page GET 200s 0.092 Fraction human m/(m+www) main-page GET 200s 0.087 Fraction RSS podcast feed bytes RSS/www (target <0.01) 0.004 Fraction RSS podcast feed hits RSS/www (target <0.045) 0.071 Fraction site hits amp/(amp+www) 0.092 Fraction site hits m/(m+www) 0.050 Mean human main-page transfer bytes m 17870 Mean human main-page transfer bytes www 17240 Mean transfer bytes amp 5434 Mean transfer bytes m 12850 Mean transfer bytes www 64368 Unique days seen 10 Unique hours seen 221 Unique human IPs/day equivalent 356
Podcast Feed Pollers Podcast RSS feed poll hits today/recent (20/Nov/2024) at 2024-11-20T10:22Z.
Estimated Hits per Day Partial User-Agent 196 Spotify/1.0 144 Google-Podcast 96 Podbean/FeedUpdat 93 Gofeed/1.0 48 iTMS 48 Amazon Music Podc 30 Mozilla/5.0 (Wind 24 fyyd-poll-1/0.5 21 Overcast/1.0 Podc 21 axios/1.6.8 19 itms 17 Mozilla/5.0 (comp 15 Mozilla/5.0 (Maci 13 okhttp/4.12.0 10 PocketCasts/1.0 (
Server Temperature Stats Server sampled CPU temperature this month Stat Temperature Date First 47.2°C 2024-11-01T00:00Z Min 40.8°C 2024-11-20T06:45Z Max 67.1°C 2024-11-12T11:45Z Last 42.4°C 2024-11-20T10:15Z
Build Energy Stats System energy system status when desktop pages (re)built.
Snapshot at: 2024-11-20T10:22Z
Status when pages built Count Status 244 VH 89 H 71 F 14 OK
Sources/Links A11y: Accessibility According To Actual People With Disabilities : this site's two main sins would seem to be walls of text and black-on-white; let's not talk about my long-sentence habit. A11y: Optimising a website for users with anxiety . A11y: WAVE Accessibility Evaluation Tool . Get Green Hosting! : Your easy guide to finding zero-emission web hosting. Share42.com social sharing buttons : lightweight and non-tracking. Google's Webmaster Central Help Forum . Google's Structured Data Testing Tool , and Does your page support rich results? which seems a closer reflection to GSC's view. Google's Rich Results Test : as of 2020-07-15 the Structured Data Testing Tool reports that it is being retired in favour of this. Yandex' Structured data validator . Structured Data Linter . Cross browser testing tools: browserstack.com , browserling.com , browsershots.org . (hat-tip ) Optimizing the Critical Rendering Path . Yellow Lab Tools : Online test to help speeding up heavy web pages . WebPageTest for site performance testing. PageSpeed Insights from Google, which will provide compressed/minified versions of assets, as well as reporting what should be fixed/optimised. See also for speed/performance testing: Test My Site With Google , Pingdom Website Speed Test , GTMetrix , MachMetrics which helped me quickly see where some fat (~30% of page weight) needed trimming, dotcom-monitor , Akamai Mobitest , Geek Flare , Page Weight . Nibbler: a free tool for testing websites across a number of aspects. Screaming Frog SEO Spider : "The SEO Spider is a desktop program you can install locally on PC, Mac or Linux which crawls websites' links, images, CSS, script and apps to evaluate onsite SEO." SEO Web Page Analyzer with interesting point about value of link anchor text (eg when read out by screen reader) to be able to decide to follow the link or not. MobileMoxie Page-oscope mobile page test . Alleged 8 major Google ranking signals in 2017 and Google's 9 major ranking signals and Google's 200 Ranking Factors: The Complete List : things to get right to have visitors actually come and read the content! Check My Links Chrome extension to validate links from the current page. CSS minification online at cssminifier.com , and the excellent command-line (node.js) clean-css . HTML minification at htmlcompressor.com : gives me courage to know what I can safely tune myself! Also see the Google-recommended Kangax HTMLMinifier ; this tool in its command-line version is now used in generation of this site . UnCCS and purifycss static analysis tools to allow trimming of unused CCS, per-page. Progressive JPEGs and green Martians : smart use of progressive JPEG scan scripts. Image compression online with TinyPNG (JPEGs and PNGs) or off-line (including losslessly) with zopflipng (or OptiPNG ) for PNGs, and jpegtran ClipChamp online video compression . ImageMagick portable command-line image processing suite. Feed (eg Atom) validation . W3C Validator and HTML outliner. W3C CSS validator , including embedded in an HTML page. W3C Feed Validation Service . Cast Feed Validator : Check the Health of Your Podcast . Livewire Podcast Validator . Validator for subtitle files: SRT, VTT, SBV, SSA, and ASS . Podcast GUID : Generate a unique, global identifier for your podcast. CORS Tester . Apple Podcast RSS feed requirements . TagCrowd , Wordclouds : create custom word clouds from, eg, your Web own page. Normalise characters in response to a W3C validation warning "Text run is not in Unicode Normalization Form C" with FileFormat.info . Pixabay for some handy images : thanks! Website Dimensions, Best Practices .Blocking robots on your web page – the list of 1800 bad bots . TinEye reverse image search. Free Security Tests . Zencastr : High Fidelity Podcasting : includes a free tier. Performance Budget Calculator . DNS checking/validation: DNS Checker , DNS Lookup , DNS Health Check and DNS Reports . Transcobble local transcription in the browser. See also Your own free transcripts: how to install Whisper.cpp on Mac OS Convert simple WebVTT body to HTML5 with an awk script .