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Race your website.
Intelligent Performance Analysis
Solo Run
Prequalify
soon
Pack Race
soon
—
Sites Raced
—
Fastest LCP
ZRH
Measurement Node
Standings
Leaderboard → #
Domain
LCP
FCP
TTFB
TBT
Efficiency
Loading standings…
Think you can go faster?
Under Construction
Prequalify
Compare against class
Run your site against a cohort of competitors. See where you rank before the race starts.
Pack Race
Race with others
Submit your site and race live alongside other domains. Leaderboard updates in real time.
Championship
Season standings
Performance tracked over time. Improvement scores. Rankings that evolve as you optimise.
Scanning...
0.0s
Initializing
Env Probe
Cold Runs
Warm Runs
Aggregation
While you wait
Leverage the tools to optimise your performance!
TTFB Efficiency
91%
Render Efficiency
67%
JS Cost Ratio
99%
Efficiency Radar
Font Payload
100%
Image Optimization
80%
Protocol Score
75%
We measure both cold and warm starts
to simulate first-time as well as returning users
Cold · First Visit
1,380ms
No cache
Full TLS · Fresh TCP
Full TLS · Fresh TCP
Warm · Return Visit
715ms
Cache resumed
TLS session ticket
TLS session ticket
gap
48%
faster
Caching
TLS resumption
CDN config
TLS resumption
CDN config
Every relevant data point — measured and derived into intelligence to help focus your efforts.
Measured across 10 runs
LCP · FCP · TTFB · TBT · CLS
DNS · TCP · TLS timing
Resource waterfall
Cache + protocol state
Server IP + geography
Derived intelligence
Efficiency score
Physics floor
LCP decomposition
Cold → warm delta
Ranked opportunities
Resolving server location…
You'll see in the dashboard we give you an idea of what your optimal performance could be, based on these distances.
Competitive Mode
Every scan
is a lap.
is a lap.
Climb the leaderboard. Set the fastest time.
Scan Complete
warm LCP p50
PARTIAL SCAN — some runs timed out
Redirecting to results…
Provisional rank: --