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--- /dev/null
+++ b/site/content/blog/yara-x-just-got-faster/index.md
@@ -0,0 +1,143 @@
+---
+title: "YARA-X just got faster"
+description: "Explore recent performance improvements in YARA-X, including daachorse Aho-Corasick integration and RegexSet evaluation optimizations."
+summary: ""
+date: 2026-05-13T13:20:00+02:00
+lastmod: 2026-05-13T13:20:00+02:00
+draft: false
+weight: 50
+categories: []
+tags: []
+contributors: [ "Victor M. Alvarez" ]
+pinned: false
+homepage: false
+seo:
+  title: "YARA-X just got faster"
+  description: "Explore recent performance improvements in YARA-X, including daachorse Aho-Corasick integration and RegexSet evaluation optimizations."
+  canonical: ""
+  noindex: false
+---
+Almost a year ago, we published a blog post titled [YARA-X just got
+smarter]({{< ref "blog/yara-x-just-got-smarter/index.md" >}}). It described
+some improvements aimed at making life easier for our users. Today, we are
+publishing a similar entry, but this time it focuses on performance
+improvements rather than usability.
+
+While YARA-X has consistently offered robust performance, two major recent
+changes—[PR #654](https://github.com/VirusTotal/yara-x/pull/654) and
+[PR #657](https://github.com/VirusTotal/yara-x/pull/657)—introduce
+groundbreaking optimizations to core pattern matching and rules that make heavy
+use of the `matches` operator.
+
+Here is a deep dive into how these performance gains were achieved.
+
+
+## 1. Replacing aho_corasick with daachorse
+
+When searching for hundreds of thousands of byte strings simultaneously,
+YARA-X relies on the Aho-Corasick algorithm. This is the primary workhorse
+of the YARA-X scanning engine. 
+
+Previously, YARA-X utilized the widely used
+[`aho_corasick`](https://github.com/BurntSushi/aho-corasick) crate, a robust
+and performant implementation of the Aho-Corasick algorithm in Rust. However, 
+[PR #654](https://github.com/VirusTotal/yara-x/pull/654) replaces `aho_corasick`
+with [`daachorse`](https://github.com/daac-tools/daachorse), a much faster
+implementation built around a compact double-array trie data structure.
+
+Conceptually, the implementation in `daachorse` mirrors the core design
+principles of the original C-based YARA engine. Its performance gains over the
+standard `aho_corasick` crate stem from two primary architectural advantages:
+
+1. **Tighter inner loop**: Byte-by-byte traversal through NFA transitions
+   requires fewer memory indirections and branching instructions.
+
+2. **Cache-efficient storage**: The double-array automaton layout optimizes
+   memory locality, drastically reducing CPU cache misses during intensive
+   scanning over large files.
+
+Migrating to `daachorse` had its own challenges, though. To facilitate a
+seamless transition and ensure YARA-X's matching semantics were fully 
+preserved, upstream contributions were made to `daachorse` to align its
+API closer to the familiar `aho_corasick` crate. Most notably,
+[PR #128](https://github.com/daac-tools/daachorse/pull/128) added
+support for Aho-Corasick automatons with duplicate patterns or no patterns
+at all.
+
+#### Real-world benchmarks
+
+Using the full rule set from [YARA Forge](https://yarahq.github.io/) across
+a corpus of 500 random VirusTotal files (totaling ~24GB), `daachorse` achieved
+remarkable benchmark results:
+
+| Scanner | Scan Time | Speedup |
+|---|---|---|
+| YARA-X (daachorse) | 26.152s | — |
+| YARA-X (aho_corasick) | 57.584s | YARA-X with daachorse is 2.20x faster |
+| YARA (legacy) | 48.275s | YARA-X with daachorse is 1.85x faster |
+
+This brings YARA-X up to speed with legacy YARA in terms of performance. Now,
+we can guarantee that **YARA-X is faster than YARA** in almost all cases, with
+very few exceptions.
+
+Starting with YARA-X v1.16.0, you can enjoy this improvement.
+
+## 2. Simultaneous regex evaluation
+
+When authoring complex YARA rules, analysts frequently evaluate a single
+variable, structure field access, or module output against dozens of distinct
+regular expressions inside an `or` condition. A common example we had 
+observed in VirusTotal is inspecting domain names or URLs:
+
+```yara
+condition:
+    vt.net.domain.raw matches /evil-c2\.com/ or
+    vt.net.domain.raw matches /phishing-login\.net/ or
+    vt.net.domain.raw matches /malicious-dga[0-9]{4}\.org/
+```
+
+The example above is only for illustrating the point; in real life, we have seen
+rules with hundreds of `matches` operations like these.
+
+Previously, YARA-X evaluated each `matches` expression sequentially. If a rule
+contained fifty regex checks against the same field, the scanning engine would
+execute fifty separate passes over the target string.
+
+[PR #657](https://github.com/VirusTotal/yara-x/pull/657) introduces an advanced
+compiler optimization that detects identical match targets within `or`
+conditions and automatically groups their regular expressions into a unified
+[`RegexSet`](https://docs.rs/regex/latest/regex/struct.RegexSet.html).
+
+A `RegexSet` is a specialized feature of the standard Rust
+[`regex`](https://github.com/rust-lang/regex) crate designed precisely to speed
+up the matching of a single string against multiple regular expressions at the
+same time.
+
+When regular expressions are evaluated sequentially, the scanning engine incurs
+repeated overhead: it must re-initialize its search state and scan the entire
+target string from beginning to end for every single pattern. As rule
+complexity grows, this redundant scanning becomes a major performance
+bottleneck.
+
+By grouping these expressions into a `RegexSet`, the compiler combines all
+individual regular expressions into a single, unified state machine
+(automaton). When a target string is inspected, the scanning engine executes
+exactly **one scan pass** over the data. As it steps through each character in
+the target string, the unified state machine simultaneously tracks and evaluates
+potential matches for all grouped regex patterns at once.
+
+This optimization shifts the scanning complexity from scaling linearly with the
+number of regex patterns to a single, highly efficient pass over the input
+string, delivering a huge speed improvement when executing complex rule sets.
+
+This improvement will be released in the upcoming YARA-X v1.17.0. However, we
+have already deployed these changes to VirusTotal Livehunt and observed a
+dramatic drop in scanning time for domain-related rules. The 99th percentile
+execution time was cut in half, dropping from an average of over 6 seconds to
+less than 3 seconds. In other words, 99% of rule evaluations now complete in
+under 3 seconds, whereas they previously exceeded 6 seconds. Additionally, the CPU
+costs associated to running this workload was also cut in half.
+
+{{< figure src="graph.png" caption="Scanning time for domain-related rules in VirusTotal Livehunt. Notice the abrupt drop on May 11." >}}
+
+
diff --git a/site/content/blog/yara-x-is-getting-smarter/index.md b/site/content/blog/yara-x-just-got-smarter/index.md
similarity index 99%
rename from site/content/blog/yara-x-is-getting-smarter/index.md
rename to site/content/blog/yara-x-just-got-smarter/index.md
index e0b998547..eeb3b72ce 100644
--- a/site/content/blog/yara-x-is-getting-smarter/index.md
+++ b/site/content/blog/yara-x-just-got-smarter/index.md
@@ -12,7 +12,7 @@ contributors: [ "Victor M. Alvarez" ]
 pinned: false
 homepage: false
 seo:
-  title: "YARA-X is getting smarter!"
+  title: "YARA-X just got smarter"
   description: "Unpacking new features for detecting unsatisfiable expressions"
   canonical: "" # custom canonical URL (optional)
   noindex: false # false (default) or true
diff --git a/site/hugo_stats.json b/site/hugo_stats.json
index 63dd1a8bf..b627090fd 100644
--- a/site/hugo_stats.json
+++ b/site/hugo_stats.json
@@ -75,6 +75,7 @@
       "bg-dots",
       "blog",
       "blog-header",
+      "blur-up",
       "btn",
       "btn-close",
       "btn-cta",
@@ -171,6 +172,7 @@
       "justify-content-center",
       "justify-content-end",
       "justify-content-start",
+      "lazyload",
       "lead",
       "list",
       "list-inline",
@@ -322,6 +324,7 @@
       "-t---tab-size-num_spaces",
       "-what-about-the-original-yara",
       "-x---module-data-modulefile",
+      "1-replacing-aho_corasick-with-daachorse",
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       "100",
       "102",
@@ -329,6 +332,7 @@
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       "105",
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+      "2-simultaneous-regex-evaluation",
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       "93",
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@@ -359,11 +363,13 @@
       "api-overview",
       "api-reference",
       "applying-the-same-condition-to-many-patterns",
+      "array-variables",
       "assembly",
       "assemblyref",
       "base64-modifier",
       "benefits-for-teams-and-organizations",
       "better-error-reporting",
+      "better-performance",
       "binary-similarity",
       "block-scanning-mode",
       "build",
@@ -371,6 +377,7 @@
       "building-the-go-library",
       "buildtool",
       "buildversion",
+      "built-in-len-method",
       "buttonColorMode",
       "calculate_checksum",
       "certificate",
@@ -408,6 +415,7 @@
       "crc32string",
       "data-consistency-in-overlapping-blocks",
       "define_globalidentifier-value",
+      "defining-external-variables",
       "deps",
       "deserialize_fromfile",
       "deviationoffset-size-mean",
@@ -509,10 +517,8 @@
       "has_importimport",
       "has_rpathrpath",
       "header",
-      "heading",
       "hexinteger",
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-      "higher-overall-performance",
       "how-it-works",
       "how-yara-x-improves-on-yara",
       "identifier",
@@ -621,6 +627,7 @@
       "protoitem",
       "query",
       "reading-data-at-a-given-offset",
+      "real-world-benchmarks",
       "referencing-other-rules",
       "remote-paths",
       "resource",
@@ -679,6 +686,7 @@
       "stream",
       "stricter-escaped-characters-in-regular-expressions",
       "string-literals",
+      "struct-variables",
       "subsystem",
       "sym",
       "symbind",