What powers samwho.dev?
Last seen Aug 2026 · 11 technologies across 9 categories
CDN
Font scripts
Issue trackers
JavaScript frameworks
Miscellaneous
Operating systems
Performance
Security
Web servers
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| big o | #4 | 2,700 |
| reservoir sampling | #4 | 58 |
| big o notation | #17 | 43 |
| turing machine | #29 | 21 |
| o notation | #26 | 21 |
| machine turing | #24 | 21 |
| memory allocation | #6 | 16 |
| how big o | #4 | 11 |
| postgresql auto increment primary key | #7 | 8 |
| hashing | #5 | 6 |
| what is a turing machine | #13 | 5 |
| autoincrement | #6 | 5 |
| postgresql auto-increment primary key | #9 | 5 |
| the big o meaning | #8 | 4 |
| big o order of growth | #4 | 3 |
| big-o order of growth | #4 | 3 |
| auto-increment postgres | #5 | 3 |
| big o of | #7 | 2 |
| big o log | #33 | 2 |
| what is reservoir sampling | #4 | 2 |
| autoincrement postgresql | #7 | 2 |
| auto increment postgres | #5 | 2 |
| auto increment id postgres | #5 | 2 |
| reservoir sampling algorithm | #4 | 2 |
| mcdonald's rejection letter | #4 | 2 |
The site's top keywords in Google (US), with the visits each one is estimated to bring per month.
Top backlinks
Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.
AI Crawlers
No AI crawlers blocked
Audience
- 67% desktop
- 33% phone
United States
India
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
5.55 / 10 · ranked #152,839 of all domains
194 referring domains · OpenPageRank
Search traffic
2,900 est. monthly organic visits (US)
160 keywords in Google's top 30
Core Web Vitals
| LCP | 1.3 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 700 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English
- Weight: 0.1 MB · 21 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on OVHcloud (57.129.128.250, IPv6)
- DNS: Porkbun
- Email: Fastmail
- Email security: no SPF record, no DMARC record
- SSL: Let's Encrypt, ECDSA P256, expires Oct 2026
- Common Crawl link graph: rank 2,080,000, 3 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| newsletter.samwho.dev | 8 |
| samwho.dev | 6 |
Full technology history →
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Recent changes
- detected Cloudflare Jul 2026
- detected Nginx Jul 2026
- detected Ubuntu Jul 2026
- detected Cloudflare Apr 2026
- dropped Fastly Nov 2025
- dropped GitHub Pages Nov 2025
- dropped Varnish Nov 2025
- detected Nginx Oct 2025
- detected Ubuntu Oct 2025