infrastructure tier

`infrastructure-web-performance-analyzer`

Web performance metrics (Core-Web-Vitals-style grading) implementing foundation-web-analysis::Analyzer -- Google PageSpeed Insights API client, mobile/desktop Lighthouse score + LCP/CLS/INP/FCP/TTFB/TTI extraction, opportunity/diagnostic collection, and Core-Web-Vitals pass/fail + letter-grade derivation

Web performance metrics (Core-Web-Vitals-style grading) implementing foundation-web-analysis::Analyzer -- Google PageSpeed Insights API client, mobile/desktop Lighthouse score + LCP/CLS/INP/FCP/TTFB/TTI extraction, opportunity/diagnostic collection, and Core-Web-Vitals pass/fail + letter-grade derivation

Tier	infrastructure
Role	unclassified (baselined)
Path	`crates/infrastructure/web-performance-analyzer`
Edition	2021
Targets	infrastructure_web_performance_analyzer
Public items	25 across 2 modules
Tests	40

What it is for

# infrastructure-web-performance-analyzer

Web performance metrics (Core-Web-Vitals-style grading) analyzer implementing foundation_web_analysis::Analyzer. Runs the Google PageSpeed Insights API for both mobile and desktop strategies, extracts the overall Lighthouse score, Core Web Vitals (LCP, CLS, INP, plus FCP/TTFB/Speed Index/TTI/TBT), and (mobile only) improvement opportunities and diagnostics. Provides letter-grade (PerformanceGrade) and per-vital (VitalRating) derivation plus a passes_core_web_vitals check.

Lifted from plumber/src/analyzers/performance.rs and plumber/src/models/performance_metrics.rs (sprint 3.46, wave 2 -- see CHANGELOG.md for provenance).

Capabilities

`analyzer (other)`

Web performance analyzer -- Google PageSpeed Insights API client.

Item
`pub const DEFAULT_MAX_BYTES: usize`
`pub const DEFAULT_BASE_URL: & str`

`PerformanceAnalyzer`

Web performance analyzer -- Google PageSpeed Insights API client.

Item
`pub struct PerformanceAnalyzer`
`PerformanceAnalyzer :: fn new(api_key : Option <String>,) -> std::result::Result <Self, infrastructure_fetcher::SafeHttpError>`
`PerformanceAnalyzer :: fn with_max_bytes(mut self, max_bytes : usize) -> Self`
`PerformanceAnalyzer :: fn with_base_url(mut self, base_url : impl Into <String>) -> Self`
`PerformanceAnalyzer :: fn default() -> Self`
`PerformanceAnalyzer :: fn name(& self) -> & 'static str`
`PerformanceAnalyzer :: async fn analyze(& self, organization_id : Uuid, website_url : & str) -> Result <AnalysisResult>`
`PerformanceAnalyzer :: fn requires_link_graph(& self) -> bool`
`PerformanceAnalyzer :: fn cache_ttl_days(& self) -> u32`

`PerformanceDiagnostic`

Web performance metrics data model.

Item
`pub struct PerformanceDiagnostic`

`PerformanceGrade`

Web performance metrics data model.

Item
`pub enum PerformanceGrade`
`PerformanceGrade :: fn fmt(& self, f : & mut std::fmt::Formatter <'_>) -> std::fmt::Result`

`PerformanceMetrics`

Web performance metrics data model.

Item
`pub struct PerformanceMetrics`
`PerformanceMetrics :: fn default() -> Self`
`PerformanceMetrics :: fn new(organization_id : Uuid, url : & str) -> Self`
`PerformanceMetrics :: fn lcp_rating(& self, mobile : bool) -> Option <VitalRating>`
`PerformanceMetrics :: fn cls_rating(& self, mobile : bool) -> Option <VitalRating>`
`PerformanceMetrics :: fn inp_rating(& self, mobile : bool) -> Option <VitalRating>`
`PerformanceMetrics :: fn grade(& self, mobile : bool) -> Option <PerformanceGrade>`
`PerformanceMetrics :: fn passes_core_web_vitals(& self, mobile : bool) -> bool`

`PerformanceOpportunity`

Web performance metrics data model.

Item
`pub struct PerformanceOpportunity`

`VitalRating`

Web performance metrics data model.

Item
`pub enum VitalRating`
`VitalRating :: fn fmt(& self, f : & mut std::fmt::Formatter <'_>) -> std::fmt::Result`

How to use it

No examples/ target and no doctest in this crate's rustdoc. The tests listed under Verification are the closest executable usage.

Module structure

infrastructure_web_performance_analyzer

analyzer
models

flowchart TD
  n_infrastructure_web_performance_analyzer["infrastructure_web_performance_analyzer"]
  n_infrastructure_web_performance_analyzer --> n_analyzer["analyzer"]
  n_infrastructure_web_performance_analyzer --> n_models["models"]

Public surface

`analyzer`

Item	What it is
`pub const DEFAULT_MAX_BYTES: usize`	Response body byte cap for a PageSpeed Insights API response (Gate 1.5.6 input limit)
`pub const DEFAULT_BASE_URL: & str`	The real PageSpeed Insights v5 endpoint (source's own default).
`pub struct PerformanceAnalyzer`	Analyzer for website performance using the Google PageSpeed Insights API
`PerformanceAnalyzer :: fn new(api_key : Option <String>,) -> std::result::Result <Self, infrastructure_fetcher::SafeHttpError>`	Build an analyzer with the default byte cap (`DEFAULT_MAX_BYTES`), timeout (`infrastructure_fetcher::safe_http::DEFAULT_TIMEOUT`, 30s), and the real PageSpeed Insights endpoint
`PerformanceAnalyzer :: fn with_max_bytes(mut self, max_bytes : usize) -> Self`	Override the response body byte cap.
`PerformanceAnalyzer :: fn with_base_url(mut self, base_url : impl Into <String>) -> Self`	Override the PageSpeed Insights base URL -- a test-only escape hatch (mirrors `BacklinkFinder::with_search_bases`) so `analyze()`'s both-strategies-fail error path is exercised against an unreachable local address instead of depending on live Google API traffic in a unit test.
`PerformanceAnalyzer :: fn default() -> Self`	# Panics Panics if the underlying `SafeHttpClient` cannot be built (TLS backend init failure) -- matches the source's `expect`-on-construction posture (`Client::builder()...expect("Failed to build HTTP client")`)
`PerformanceAnalyzer :: fn name(& self) -> & 'static str`	—
`PerformanceAnalyzer :: async fn analyze(& self, organization_id : Uuid, website_url : & str) -> Result <AnalysisResult>`	—
`PerformanceAnalyzer :: fn requires_link_graph(& self) -> bool`	—
`PerformanceAnalyzer :: fn cache_ttl_days(& self) -> u32`	—

`models`

Item	What it is
`pub struct PerformanceMetrics`	Performance metrics for one organization's website, gathered from Google PageSpeed Insights (mobile + desktop Lighthouse runs).
`pub struct PerformanceOpportunity`	A Lighthouse "opportunity" audit -- a specific, actionable change with an estimated time (and, where known, byte) savings.
`pub struct PerformanceDiagnostic`	A Lighthouse "diagnostic" audit -- informational detail that does not carry a savings estimate (DOM size, request counts, third-party impact).
`PerformanceMetrics :: fn default() -> Self`	—
`PerformanceMetrics :: fn new(organization_id : Uuid, url : & str) -> Self`	—
`PerformanceMetrics :: fn lcp_rating(& self, mobile : bool) -> Option <VitalRating>`	Rate the Largest Contentful Paint against the standard Core Web Vitals thresholds (good <= 2500ms, needs improvement <= 4000ms).
`PerformanceMetrics :: fn cls_rating(& self, mobile : bool) -> Option <VitalRating>`	Rate the Cumulative Layout Shift against the standard Core Web Vitals thresholds (good <= 0.1, needs improvement <= 0.25).
`PerformanceMetrics :: fn inp_rating(& self, mobile : bool) -> Option <VitalRating>`	Rate the Interaction to Next Paint against the standard Core Web Vitals thresholds (good <= 200ms, needs improvement <= 500ms).
`PerformanceMetrics :: fn grade(& self, mobile : bool) -> Option <PerformanceGrade>`	Overall letter grade from the Lighthouse performance score (0-100).
`PerformanceMetrics :: fn passes_core_web_vitals(& self, mobile : bool) -> bool`	True only when LCP, CLS, and INP are all present and all rate `Good`
`pub enum VitalRating`	—
`VitalRating :: fn fmt(& self, f : & mut std::fmt::Formatter <'_>) -> std::fmt::Result`	—
`pub enum PerformanceGrade`	—
`PerformanceGrade :: fn fmt(& self, f : & mut std::fmt::Formatter <'_>) -> std::fmt::Result`	—

Re-exports. Exported here, defined elsewhere.

Export	Defined in
`{PerformanceAnalyzer,DEFAULT_BASE_URL,DEFAULT_MAX_BYTES}`	`analyzer::{PerformanceAnalyzer,DEFAULT_BASE_URL,DEFAULT_MAX_BYTES}`
`{PerformanceDiagnostic,PerformanceGrade,PerformanceMetrics,PerformanceOpportunity,VitalRating,}`	`models::{PerformanceDiagnostic,PerformanceGrade,PerformanceMetrics,PerformanceOpportunity,VitalRating,}`

Boundary

Reaches into foundation.

Shares tier infrastructure with 82 other crates: infrastructure-acquire, infrastructure-adapters-google-calendar, infrastructure-adapters-google-gmail, infrastructure-adapters-google-places, infrastructure-adapters-google-trends, infrastructure-adapters-shodan, infrastructure-adapters-yelp, infrastructure-agent, … (82 total).

_What this crate deliberately does NOT own is a judgment. No committed registry records one for it, so none is stated here._

Where it sits

Tier (ontology)	`infrastructure`
Architectural role (taxonomy)	`unclassified (baselined)`
Location	`crates/infrastructure/web-performance-analyzer`
Vocabulary in force (lexicon)	`current`

Tier flow. Which tiers this crate's own edges cross.

flowchart LR
  n_infrastructure["infrastructure"] --> n_foundation["foundation"]

Dependencies

Runtime, in this workspace.

Crate	Tier	Optional	Only on
`foundation-web-analysis`	foundation	no	always
`infrastructure-fetcher`	infrastructure	no	always

Runtime, from outside the workspace.

Crate	Requirement	Features	Optional	Only on
`async-trait`	`^0.1`	—	no	always
`chrono`	`^0.4`	`serde`	no	always
`serde`	`^1`	`derive`	no	always
`serde_json`	`^1`	—	no	always
`thiserror`	`^2`	—	no	always
`url`	`^2`	—	no	always
`uuid`	`^1`	`v4`, `v7`, `serde`, `js`	no	always

Development, from outside the workspace.

Crate	Requirement	Features	Optional	Only on
`tokio`	`^1`	`full`, `full`, `test-util`	no	always
`tokio-test`	`^0.4`	—	no	always

Build. None.

Depended on by. Nothing in this workspace.

Signal flow — what reaches this crate, and what it reaches.

flowchart LR
  SELF["infrastructure-web-performance-analyzer"]
  SELF -->|runtime| n_foundation_web_analysis["foundation-web-analysis"]
  SELF -->|runtime| n_infrastructure_fetcher["infrastructure-fetcher"]
  classDef self fill:#1f883d,stroke:#1f883d,color:#fff;
  class SELF self;

Feature flags

No Cargo features are defined: every capability is unconditional, so no consumer can receive a half-wired crate.

Targets

Kind	Name	Source
lib	`infrastructure_web_performance_analyzer`	`src/lib.rs`

Error model

No public error type was detected: no public item declares a type named *Error, and no public signature returns one.

Operational characteristics

Property	Evidence
async public surface	yes
async runtime	none detected
database access	none detected
network I/O	none detected
unsafe code	none detected
environment variables	none detected

No unsafe block, unsafe fn, unsafe impl or unsafe trait was found by the parser anywhere in this crate's source.

Configuration

No environment variable is read with a literal name anywhere in this crate. A variable whose key is computed at run time cannot be listed here, and is not claimed to be absent.

No workspace crate depends on this one.

Verification

Kind	Count
Unit tests	40
Integration tests	0
Examples	0
Doctests	0

Evidence by module. How often each public module is named by something executable.

Module	Tests	Examples	Consumers
`analyzer`	3	0	0
`models`	5	0	0

What the tests establish, by name:

analyze_fails_fast_on_invalid_url — src/analyzer.rs
analyze_records_errors_and_flags_manual_review_when_both_strategies_fail — src/analyzer.rs
cache_ttl_is_one_day — src/analyzer.rs
data_incomplete_review_absent_when_at_least_one_score_present — src/analyzer.rs
data_incomplete_review_present_when_no_scores_collected — src/analyzer.rs
extract_diagnostics_captures_third_party_blocking_time — src/analyzer.rs
extract_diagnostics_includes_known_diagnostic_ids — src/analyzer.rs
extract_metrics_handles_missing_lighthouse_result — src/analyzer.rs
extract_metrics_maps_score_and_core_web_vitals_for_mobile — src/analyzer.rs
extract_metrics_only_populates_opportunities_and_diagnostics_for_mobile — src/analyzer.rs
extract_metrics_writes_desktop_fields_when_not_mobile — src/analyzer.rs
extract_opportunities_ignores_ids_outside_the_known_set — src/analyzer.rs
extract_opportunities_includes_audit_with_positive_savings — src/analyzer.rs
extract_opportunities_skips_audit_with_zero_savings_and_high_score — src/analyzer.rs
name_is_performance_analyzer — src/analyzer.rs
requires_link_graph_is_false — src/analyzer.rs
cls_rating_good_at_or_below_point_one — src/models.rs
cls_rating_needs_improvement_between_point_one_and_point_two_five — src/models.rs
cls_rating_poor_above_point_two_five — src/models.rs
grade_a_for_score_90_to_100 — src/models.rs
grade_b_for_score_80_to_89 — src/models.rs
grade_c_for_score_70_to_79 — src/models.rs
grade_d_for_score_50_to_69 — src/models.rs
grade_f_for_score_below_50 — src/models.rs
grade_none_when_score_missing — src/models.rs
inp_rating_good_at_or_below_200ms — src/models.rs
inp_rating_needs_improvement_between_200_and_500ms — src/models.rs
inp_rating_poor_above_500ms — src/models.rs
lcp_rating_good_at_or_below_2500ms — src/models.rs
lcp_rating_needs_improvement_between_2500_and_4000ms — src/models.rs
_… 10 more_

Documentation coverage

Measure	Documented	Total
Public items with rustdoc	15	25
Public modules with a `//!` block	2	2

pie showData
    title Public items with rustdoc
    "Documented" : 15
    "No rustdoc detected" : 10

Metrics

Metric	Value
Rust source files	3
Source lines	1174
Code lines	918
Public API items	25
Public modules	2
Tests	40
Examples	0
Cargo features	0
Direct runtime dependencies	9
Workspace reverse dependencies	0

pie showData
    title Public API by kind
    "constant" : 2
    "enum" : 2
    "method" : 17
    "struct" : 4

pie showData
    title Rust source composition
    "Code" : 918
    "Blank or comment" : 256

Generation

Rendered by tools-corpus corpus readme from repository evidence alone, renderer schema 2, lexicon current. No model, network service or database was consulted. Regenerate with tools-corpus corpus readme --write; verify with --check.

All infrastructure · Manual