From ddd7338d839077772d6438c4fe99f0c1e64cf2f4 Mon Sep 17 00:00:00 2001 From: Camillo Bruni Date: Tue, 31 Mar 2026 11:34:48 +0200 Subject: [PATCH 1/2] next --- README.md | 2 +- in-depth.html | 34 +++++++------- index.html | 6 +-- resources/JetStream.css | 2 +- resources/JetStream3Logo.svg | 14 ------ resources/JetStreamLogo.src.svg | 81 +++++++++++++++++++++++++++++++++ resources/JetStreamNxLogo.svg | 52 +++++++++++++++++++++ 7 files changed, 155 insertions(+), 36 deletions(-) delete mode 100644 resources/JetStream3Logo.svg create mode 100644 resources/JetStreamLogo.src.svg create mode 100644 resources/JetStreamNxLogo.svg diff --git a/README.md b/README.md index 940ab1a3..698ceda0 100644 --- a/README.md +++ b/README.md @@ -1,6 +1,6 @@ # What is JetStream? -JetStream 3 is a JavaScript and WebAssembly benchmark suite. +JetStream Next is a JavaScript and WebAssembly benchmark suite. For more information see the index and in-depth pages of the deployed benchmark. A preview of the current main branch is available at [https://webkit-jetstream-preview.netlify.app/](https://webkit-jetstream-preview.netlify.app/). diff --git a/in-depth.html b/in-depth.html index 23b83bff..149caa99 100644 --- a/in-depth.html +++ b/in-depth.html @@ -27,14 +27,14 @@ - JetStream 3 In-Depth Analysis + JetStream Next In-Depth Analysis

@@ -42,7 +42,7 @@

In-Depth Analysis

- JetStream 3 combines together a variety of JavaScript and WebAssembly benchmarks, covering a variety of + JetStream Next combines together a variety of JavaScript and WebAssembly benchmarks, covering a variety of advanced workloads and programming techniques, and reports a single score that balances them using the geometric mean.

@@ -52,15 +52,15 @@

In-Depth Analysis

up all benchmarks. Some benchmarks demonstrate tradeoffs, and aggressive or specialized optimizations for one benchmark might make another benchmark slower. - JetStream 3 rewards browsers that start up quickly, execute code quickly, and continue running smoothly. + JetStream Next rewards browsers that start up quickly, execute code quickly, and continue running smoothly.

- Each benchmark in JetStream 3 computes its own individual score. + Each benchmark in JetStream Next computes its own individual score. Scores in JetStream are dimensionless floating point numbers, where a higher score is better. JetStream weighs each benchmark equally, taking the geometric mean over each individual - benchmark's score to compute the overall JetStream 3 score. + benchmark's score to compute the overall JetStream Next score. The geometric mean ensures that a multiplicative improvement of any individual score has the same effect on the aggregated score, regardless of the absolute value of the individual score. For example, an improvement by 5% of the sub score of benchmark A has the same effect on the total score @@ -76,7 +76,7 @@

In-Depth Analysis

- For most of the JavaScript and WebAssembly benchmarks in JetStream 3, individual scores equally weigh + For most of the JavaScript and WebAssembly benchmarks in JetStream Next, individual scores equally weigh startup performance, worst case performance, and average case performance. These three metrics are crucial to running performant JavaScript and WebAssembly in the browser. Fast startup times lead browsers to loading pages more quickly. @@ -85,8 +85,8 @@

In-Depth Analysis

- All but two of JetStream 3's benchmarks run for N iterations, where N is often 120. - JetStream 3 calculates the startup score from the time it takes to run the first iteration. + All but two of JetStream Next's benchmarks run for N iterations, where N is often 120. + JetStream Next calculates the startup score from the time it takes to run the first iteration. The worst case score is the average of the worst M iterations, excluding the first iteration. M is always less than N, and is usually 4. The average case score is the average of all but the first iteration. @@ -94,7 +94,7 @@

In-Depth Analysis

- JetStream 3 also includes a JavaScript benchmark named WSL. + JetStream Next also includes a JavaScript benchmark named WSL. WSL is an implementation of a GPU shading language written in JavaScript. WSL does not use the above mechanism for scoring because it has a long running time. Instead, the WSL benchmark computes its score as the geometric mean over two metrics: the time it takes @@ -103,26 +103,26 @@

In-Depth Analysis

- JetStream 3 includes parts of these benchmark suites that came before it: + JetStream Next includes parts of these benchmark suites that came before it: SunSpider, Octane 2, JetStream 2, ARES-6, Web Tooling Benchmark, and benchmarks inspired by Kraken. - JetStream 3 also includes a new set of benchmarks that measure the performance of WebAssembly, Web + JetStream Next also includes a new set of benchmarks that measure the performance of WebAssembly, Web Workers, Promises, async iteration, unicode regular expressions, and JavaScript parsing.

Earlier versions of JetStream also contained asm.js workloads. With the release of WebAssembly, developers should switch to that technology instead. - JetStream 3 thus contains no asm.js workloads any longer and has converted some of the prior ones into + JetStream Next thus contains no asm.js workloads any longer and has converted some of the prior ones into WebAssembly.

- Besides the aforementioned averaging over multiple iterations, the JetStream 3 benchmark driver also + Besides the aforementioned averaging over multiple iterations, the JetStream Next benchmark driver also tries to improve score stability by other means. For example, it pre-fetches network resources prior to running the benchmarks. This can reduce perturbations on the measurement of JavaScript execution time due to second order @@ -130,12 +130,12 @@

In-Depth Analysis

- Note that scores from JetStream 3 are not comparable to scores to other versions + Note that scores from JetStream Next are not comparable to scores to other versions of any JetStream benchmark.

- JetStream 3 has 77 default workloads + JetStream Next has 77 default workloads

@@ -344,7 +344,7 @@

Two Dart benchmark programs compiled to WasmGC that are using a simplified version of the Flutter UI framework to layout and animate UI elements. The complex variant contains a large number of widgets and is thus more of a stress test, - disabled by default in JetStream 3. + disabled by default in JetStream Next. The todomvc variant is a more realistic TODO list application and enabled by default. See Dart/README.md for more information.
diff --git a/index.html b/index.html index 2647ad49..198ff3d9 100644 --- a/index.html +++ b/index.html @@ -27,7 +27,7 @@ - JetStream 3 + JetStream Next @@ -92,12 +92,12 @@

-

JetStream 3 is a JavaScript and WebAssembly benchmark suite focused on the most advanced web applications. It rewards browsers that start up quickly, execute code quickly, and run smoothly. For more information, read the in-depth analysis. Bigger scores are better.

+

JetStream Next is a JavaScript and WebAssembly benchmark suite focused on the most advanced web applications. It rewards browsers that start up quickly, execute code quickly, and run smoothly. For more information, read the in-depth analysis. Bigger scores are better.

Non-standard Parameters

diff --git a/resources/JetStream.css b/resources/JetStream.css index e8d2282c..75d614ca 100644 --- a/resources/JetStream.css +++ b/resources/JetStream.css @@ -177,7 +177,7 @@ img { box-sizing: border-box; background-repeat: no-repeat; background-position: center; - background-image: url("JetStream3Logo.svg"); + background-image: url("JetStreamNxLogo.svg"); color: transparent; animation: swingin 350ms ease-out forwards; will-change: transform, opacity; diff --git a/resources/JetStream3Logo.svg b/resources/JetStream3Logo.svg deleted file mode 100644 index 5f8847bc..00000000 --- a/resources/JetStream3Logo.svg +++ /dev/null @@ -1,14 +0,0 @@ - - - - - - - - - - - - - - diff --git a/resources/JetStreamLogo.src.svg b/resources/JetStreamLogo.src.svg new file mode 100644 index 00000000..bcad485d --- /dev/null +++ b/resources/JetStreamLogo.src.svg @@ -0,0 +1,81 @@ + + + + + + + + + + + + + + Nx + diff --git a/resources/JetStreamNxLogo.svg b/resources/JetStreamNxLogo.svg new file mode 100644 index 00000000..2ff9372d --- /dev/null +++ b/resources/JetStreamNxLogo.svg @@ -0,0 +1,52 @@ + + + + + + + + + + + + + + From 7b467a2777a34b49e42df03bb35debc5a4648c3a Mon Sep 17 00:00:00 2001 From: Camillo Bruni Date: Tue, 31 Mar 2026 11:36:20 +0200 Subject: [PATCH 2/2] fix-css --- resources/JetStream.css | 1 + 1 file changed, 1 insertion(+) diff --git a/resources/JetStream.css b/resources/JetStream.css index 75d614ca..32fe3418 100644 --- a/resources/JetStream.css +++ b/resources/JetStream.css @@ -177,6 +177,7 @@ img { box-sizing: border-box; background-repeat: no-repeat; background-position: center; + background-size: contain; background-image: url("JetStreamNxLogo.svg"); color: transparent; animation: swingin 350ms ease-out forwards;