Update docs and benchmarks for Startpage backend

- Update README search engines section to document Startpage as default
- Update README example to use startpage instead of google
- Add Startpage to HTML parsing benchmarks
- Fix copy-paste doc error in Google scraper (said "duckduckgo")

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: DavidTeju

README.md

@@ -34,8 +34,8 @@ $ so how do i reverse a list in python
 # search for a latex solution
 $ so --site tex how to put tilde over character
 
-# use google to search stackoverflow.com, askubuntu.com, and unix.stackexchange.com
-$ so -e google -s askubuntu -s stackoverflow -s unix how do i install linux
+# search stackoverflow.com, askubuntu.com, and unix.stackexchange.com via startpage
+$ so -e startpage -s askubuntu -s stackoverflow -s unix how do i install linux
 ```
 
 ## installation
@@ -169,15 +169,17 @@ StackExchange API with no key up to 300 times per day per IP, which I imagine is
 fine for most users.
 
 ### search engines
-The available search engines are StackExchange, DuckDuckGo, and Google.
+The available search engines are StackExchange, Startpage, DuckDuckGo, and Google.
 StackExchange will always be the fastest to search because it doesn't require an
 additional request or any HTML parsing; however, it is also very primitive.
-~~DuckDuckGo is in second place for speed, as its response HTML is much smaller
-than Google's. I've found that it performs well for my queries, so it is the
-default search engine.~~
 
-DuckDuckGo [sometimes blocks requests](https://github.com/samtay/so/issues/16), so
-it is no longer the default.
+**Startpage** is the default search engine. It proxies Google search results and
+serves them as static HTML, providing high quality results without requiring
+JavaScript.
+
+Google and DuckDuckGo now require JavaScript execution for search results, making
+them unreliable from a terminal client. They are still available via `-e google`
+or `-e duckduckgo` but may not return results.
 
 ### multi-site searching
 As stated in the [docs](https://api.stackexchange.com/docs/throttle),

benches/html_parsing.rs

@@ -1,5 +1,5 @@
 use criterion::{criterion_group, criterion_main, BenchmarkId, Criterion, Throughput};
-use so::stackexchange::scraper::{DuckDuckGo, Google, Scraper};
+use so::stackexchange::scraper::{DuckDuckGo, Google, Scraper, Startpage};
 use std::collections::HashMap;
 use std::time::Duration;
 
@@ -46,6 +46,12 @@ fn bench_html_parsers(c: &mut Criterion) {
         |b, html| b.iter(|| DuckDuckGo.parse(html, &sites, limit)),
     );
 
+    group.bench_with_input(
+        BenchmarkId::new("Startpage.parse", "exit-vim"),
+        include_str!("../test/startpage/exit-vim.html"),
+        |b, html| b.iter(|| Startpage.parse(html, &sites, limit)),
+    );
+
     let mut sites = HashMap::new();
     sites.insert(
         String::from("stackoverflow"),

src/stackexchange/scraper.rs

@@ -90,8 +90,7 @@ impl Scraper for Google {
         parse_with_selector(anchors, html, sites, limit)
     }
 
-    /// Creates duckduckgo search url given sites and query
-    /// See https://duckduckgo.com/params for more info
+    /// Creates google search url given sites and query
     fn get_url<'a, I>(&self, query: &str, sites: I) -> Url
     where
         I: IntoIterator<Item = &'a String>,