Performance data

Benchmarks

Measured TTFB and throughput data for specific route classes, configurations, and test conditions. These results are useful for technical evaluation, but they are not production guarantees and should be read with the cold-path and methodology caveats on this page.

Methodology Summary

This page draws from two benchmark datasets: a benchmark run from March 15, 2026 and an automated benchmark report from March 16, 2026. Both were single-origin environments without a CDN or a full-page cache, so every request reached PHP.

Property March 15 benchmark run March 16 automated report
DateMarch 15, 2026March 16, 2026
Standard coverage8 URLs8 URLs
Warm repeats per URL3030
Cold passes per URL1Not specified in the benchmark materials
ConfigurationsBaseline, QuantumCache Free (Redis), QuantumCache Pro (Redis)Baseline, QuantumCache Redis, QuantumCache MySQL fallback
WooCommerce coverageYesNo
Throughput sweepab, concurrency 4, 8, 16, 32ab, concurrency 32, 64, 128
EnvironmentSingle origin, no CDN, no page cacheSingle origin, no CDN, no page cache
NotesIncludes WooCommerce cold-path dataIncludes MySQL fallback data for standard pages only

The March 16 report does not include WooCommerce routes and does not split Redis results into Free and Pro.

The two datasets are complementary, but they are not one continuous study and should not be merged into a single like-for-like comparison.

Standard Pages — Warm Steady-State (Redis)

8 standard URLs, 30 warm repeats per URL

These charts summarize warm-state reductions against the no-cache baseline on standard WordPress routes. Ranges reflect variation across the tested URLs, not statistical error bounds.

BENCH-001
Standard Pages — Warm TTFB Reduction vs Baseline (Redis)
Grouped range bar chart showing TTFB p50 and p95 reductions for QuantumCache Free and QuantumCache Pro versus baseline on standard WordPress pages with Redis in warm steady-state.

March 15 benchmark run. 8 standard URLs, 30 warm repeats per URL. Single-origin environment without CDN or page cache.

Config TTFB p50 reduction TTFB p95 reduction Total response p50 Total response p95
QuantumCache Free (Redis) −22% to −28% −23% to −31% −16% to −24% −16% to −26%
QuantumCache Pro (Redis) −24% to −28% −23% to −30% −18% to −22% −20% to −24%

The March 16 automated report, which used a single Redis configuration rather than a Free/Pro split, reported TTFB p50 reductions of −24% to −27% and p95 reductions of −24% to −29%.

That corroborates the warm Redis result without adding a misleading third series to the chart.

Standard Pages — Warm Steady-State (MySQL Fallback)

Standard pages only, March 16 automated report

MySQL fallback data exists only for standard pages in the March 16 report. That report does not split the Redis results into Free and Pro tiers.

BENCH-002
Standard Pages — Warm TTFB Reduction vs Baseline (MySQL Fallback)
Range bar chart showing TTFB p50 and p95 reductions for QuantumCache MySQL fallback versus baseline on standard WordPress pages in warm steady-state.

March 16 automated report. Standard pages only. Single-origin environment without CDN or page cache.

Config TTFB p50 reduction TTFB p95 reduction Total response p50 Total response p95
QuantumCache MySQL fallback −4% to −11% −5% to −11% −1% to −8% −1% to −7%

The March 16 report recorded average DB-query counts of 46.5 per request for MySQL fallback and 3.0 for Redis. A no-cache baseline DB-query count was not captured in that report.

MySQL fallback is a measurable improvement over baseline on the tested standard routes, but it is not a peer to Redis in this benchmark set.

Standard Pages — Cold-Path Behavior

First request before warmup
Standard Pages — Cold TTFB Delta Per URL vs Baseline
March 15 benchmark run. 1 cold pass per URL after a cache flush.
Route Baseline TTFB (ms) Free delta Pro delta
/?cat=36&posts_per_page=24&paged=3164.6−9.6%−14.1%
/?cat=36&posts_per_page=36&paged=2171.1−27.6%−32.5%
/?cat=36&posts_per_page=36&paged=3168.4−24.7%−30.6%
/183.8−20.9%−21.4%
/?cat=heavycat&posts_per_page=36&paged=2182.1−22.3%−25.7%
/?cat=uncategorized&posts_per_page=36&paged=3174.1−19.3%−22.1%
/?cat=heavycat&posts_per_page=24&paged=2183.6−24.4%−27.4%

WooCommerce Archive / Listing Pages — Warm Steady-State (Redis)

March 15 benchmark run only

WooCommerce archive results should be read as two groups: heavy archive routes and lighter archive routes. Averaging them together would hide materially different behavior.

BENCH-004
WooCommerce Archive / Listing Pages — Warm TTFB Reduction vs Baseline (Redis)
Grouped chart showing warm TTFB reductions for QuantumCache Free and QuantumCache Pro on WooCommerce archive and listing routes, with heavy archive routes shown separately from lighter routes.

March 15 benchmark run. Heavy archive routes are shown separately from lighter archive routes. No MySQL fallback WooCommerce data is available.

Route group Config TTFB p50 TTFB p95
Heavy archive routesQuantumCache Free (Redis)−44% to −46%−44% to −46%
Heavy archive routesQuantumCache Pro (Redis)−44% to −45%−44% to −45%
/shop/?orderby=priceQuantumCache Free (Redis)−25.9%−26.3%
/shop/?orderby=priceQuantumCache Pro (Redis)−24.9%−25.1%
/product-category/shoes/?filter_size=MQuantumCache Free (Redis)−33.7%−35.1%
/product-category/shoes/?filter_size=MQuantumCache Pro (Redis)−32.6%−33.2%

On the heavy archive routes, Free and Pro are effectively similar at the precision of this benchmark.

Free caches these archive routes as general content. Pro applies WooCommerce-aware behavior on top of the same core engine, including a WooCommerce-specific TTL override on /shop/ miss responses.

WooCommerce Product Pages — Warm Steady-State (Redis)

March 15 benchmark run only

Important caveat: In this benchmark run, Free shows larger warm TTFB deltas than Pro on product pages. This does not indicate Free is generally faster. Pro introduces WooCommerce-specific behavior such as TTL overrides, endpoint bypass, product invalidation, and logged-in handling that is not captured by TTFB delta alone.

BENCH-005
WooCommerce Product Pages — Warm TTFB Reduction vs Baseline (Redis)
Grouped bar chart showing warm TTFB p50 and p95 reductions for QuantumCache Free and QuantumCache Pro on three WooCommerce product routes.

March 15 benchmark run. 3 product routes, 30 warm repeats per URL. The benchmark materials do not explain the measured Free and Pro delta difference on these routes.

Route Config TTFB p50 TTFB p95
/product/pro-item-0001QuantumCache Free (Redis)−37.6%−38.9%
/product/pro-item-0001QuantumCache Pro (Redis)−34.6%−31.9%
/product/pro-item-0050QuantumCache Free (Redis)−37.0%−37.5%
/product/pro-item-0050QuantumCache Pro (Redis)−34.7%−31.2%
/product/pro-item-0120QuantumCache Free (Redis)−36.7%−33.5%
/product/pro-item-0120QuantumCache Pro (Redis)−34.0%−25.0%

The measured difference is reproduced exactly as recorded. The benchmark materials do not explain why the product-page deltas are larger for Free than Pro in this run.

WooCommerce Pages — Cold-Path Behavior

First request before warmup

Cold-path behavior is mixed here too. Heavy archive routes show first-request overhead, while some filtered category and product routes show reductions. The warm-state WooCommerce charts above should not be read as first-request behavior.

WooCommerce Pages — Cold TTFB Delta Per URL vs Baseline
March 15 benchmark run. 1 cold pass per URL after a cache flush.
Route Baseline TTFB (ms) Free delta Pro delta
/shop/578.8+17.0%+16.0%
/shop/?orderby=price186.3+28.2%+30.3%
/shop/?orderby=rating631.5+5.6%+6.6%
/product-category/gadgets/589.3−8.6%−8.3%
/product-category/apparel/?min_price=50&max_price=150641.3−8.3%−7.3%
/product-category/shoes/?filter_size=M142.1−31.5%−27.3%
/product/pro-item-0001/319.4−38.9%−19.2%
/product/pro-item-0050/393.3−25.5%−6.3%
/product/pro-item-0120/400.9−23.2%−5.9%

Cold overhead is present on the heavy archive routes shown above.

The benchmark materials do not explain why the product-page cold-path reductions are larger for Free than Pro. The data is presented as measured, without smoothing or extrapolation.

Throughput — Standard Pages

Two separate studies

The standard-page throughput charts below come from different benchmark datasets. They are presented together for completeness, but they should not be read as one continuous study.

BENCH-006
Standard Pages — Throughput vs Concurrency (Redis)
Line chart showing requests per second for baseline, QuantumCache Free, and QuantumCache Pro at concurrency levels 4, 8, 16, and 32 on one standard WordPress route.

March 15 benchmark run. Tested URL: /?cat=36&posts_per_page=36&paged=2. n=400 per concurrency level.

Concurrency Baseline RPS Free RPS Pro RPS
421.7627.2927.10
834.7044.7744.10
1640.9846.3045.59
3242.0645.7945.12

Free and Pro are effectively equivalent on this standard-page throughput sweep.

The largest gains appear at lower concurrency and narrow as PHP workers saturate.

BENCH-007
Standard Pages — Throughput vs Concurrency, Extended Sweep
Line chart showing requests per second for baseline, QuantumCache Redis, and QuantumCache MySQL fallback at concurrency 32, 64, and 128 on a standard WordPress route.

March 16 automated report. Redis and MySQL fallback only, with no Free/Pro split. n=400 per concurrency level.

Concurrency Baseline RPS QuantumCache Redis RPS QuantumCache MySQL fallback RPS
3240.9344.6541.01
6442.0044.2542.54
12841.8044.3443.23

MySQL fallback shows minimal throughput improvement over baseline at the tested concurrency levels.

Throughput — WooCommerce Pages

March 15 benchmark run only
/shop/ — throughput vs concurrency
ConcurrencyBaseline RPSFree RPSPro RPS
46.0610.1710.11
89.7215.7215.61
1612.0317.2217.18
3213.3417.5917.48

On /shop/, Free and Pro track very closely across the tested concurrency levels.

/product/pro-item-0001/ — throughput vs concurrency
ConcurrencyBaseline RPSFree RPSPro RPS
411.9417.7116.91
819.3227.4326.20
1623.0929.7328.39
3225.4830.1828.69

Technical Appendix — Cache Counters

Post-warm pass
Cache Counters by Segment and Configuration
Measured after warmup in the March 15 benchmark run.
Segment Config query_hits frag_hits query_misses frag_misses query_stores frag_stores
StandardFree1361,6511420410
StandardPro2703,2842820615
WooCommerceFree5344,91632601421
WooCommercePro7988,03537002270

These counters are useful as an implementation appendix, not as a direct performance ranking.

They reflect post-warm behavior only and should not be read as cold-path evidence.

Methodology Limits

No CDN or page cache was present in either benchmark environment. All measured requests reached PHP.

MySQL fallback data exists for standard pages only. No WooCommerce MySQL fallback benchmark data is available.

Results are specific to the tested routes and configurations. Different sites, stacks, and workloads may behave differently.

Cold-path variance is real in the measured data. The benchmark materials do not explain why some routes show first-request overhead and others do not.

The product-page Free vs Pro delta difference is measured but unexplained. That applies to both warm and cold product-page data on this page.

The DB-query comparison for Redis and MySQL fallback comes from one standard-page report. That report did not capture a no-cache baseline DB-query count.

Need the architecture behind these results?

Use the technical overview for request flow and the tier comparison for product boundaries.

How It Works Free vs Pro