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Very interesting, if only to have something to compare GraalJS and GraalPy against it :) Do you still plan to import the V8/CPython sources and build them as part of the JDK (like in the initial prototype) or will the new implementation (also)</div>
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<div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Very interesting, if only to have something to compare GraalJS and GraalPy against it :) </div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Do you still plan to import the V8/CPython sources and build them as part of the JDK (like in the initial prototype) or will the new implementation (also) work with existing V8/CPython implementations (like e.g. JDKs zlib)?</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Vote: yes</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Wed, Feb 25, 2026 at 1:35 PM Sundararajan Athijegannathan <<a href="mailto:sundararajan.athijegannathan@oracle.com">sundararajan.athijegannathan@oracle.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class="msg-4580327003343363352">
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I hereby propose the (re)creation of the Detroit Project, with myself as<br>
the Lead and the Compiler Group as the sponsoring Group.<br>
<br>
The Detroit Project was originally created in February 2018 [1], with<br>
the intent to develop an implementation of the JCP-standard javax.script<br>
API [2][3] based on the V8 JavaScript engine [4]. This would enable<br>
JavaScript to be used as an extension language for Java applications,<br>
and likewise Java libraries to be accessed from JavaScript applications.<br>
The Project never got off the ground, however, so it was dissolved in<br>
September 2024 [5].<br>
<br>
Here in February 2026, there is still interest in using Java and<br>
JavaScript together. With the rise of AI, moreover, there is also<br>
interest in accessing AI functionality written in Python from Java<br>
applications.<br>
<br>
Some colleagues and I have therefore revived the original prototype<br>
JavaScript script engine based on V8, and have also prototyped a Python<br>
script engine based on CPython [6]. Using widely-adopted JavaScript<br>
and Python implementations, rather than re-implementing JavaScript and<br>
Python from scratch, ensures both low long-term maintenance costs and<br>
compatibility for existing JavaScript and Python code.<br>
<br>
We would like to move these prototypes into a proper OpenJDK Project<br>
in order to accelerate development. We expect to leverage and push<br>
the boundaries of the FFM API [7], so this work will likely influence<br>
Project Panama. Over time, the Project may consider implementing<br>
script engines for additional languages.<br>
<br>
The initial Committers will be:<br>
<br>
Jim Laskey<br>
Sundararajan Athijegannathan<br>
Jorn Vernee<br>
Mikael Vidstedt<br>
Henry Jen<br>
Maurizio Cimadamore<br>
Alan Bateman<br>
Hannes Wallnöfer<br>
Jan Lahoda<br>
Jaikiran Pai<br>
<br>
Votes are due by midnight UTC on Wednesday, 11 March.<br>
<br>
Only current OpenJDK Members [8] are eligible to vote on this motion.<br>
Votes must be cast in the open on the discuss list. Replying to this<br>
message is sufficient if your mail program honors the Reply-To header.<br>
<br>
For Lazy Consensus voting instructions, see [9].<br>
<br>
Sundar<br>
<br>
<br>
[1] <a style="margin:0px" rel="noopener noreferrer" title="https://mail.openjdk.org/pipermail/announce/2018-February/000244.html" id="m_1616575011542739086OWA3fd5b554-f3fb-b295-c6b5-0ea8216d8a67" href="https://mail.openjdk.org/pipermail/announce/2018-February/000244.html" target="_blank">
https://mail.openjdk.org/pipermail/announce/2018-February/000244.html</a><br>
[2] <a style="margin:0px" rel="noopener noreferrer" title="https://docs.oracle.com/en/java/javase/25/docs/api/java.scripting/javax/script/package-summary.html" id="m_1616575011542739086OWA6b9d177c-d869-2b0d-881e-0ff62b4e9df7" href="https://docs.oracle.com/en/java/javase/25/docs/api/java.scripting/javax/script/package-summary.html" target="_blank">
https://docs.oracle.com/en/java/javase/25/docs/api/java.scripting/javax/script/package-summary.html</a><br>
[3] <a style="margin:0px" rel="noopener noreferrer" title="https://jcp.org/en/jsr/detail?id=223" id="m_1616575011542739086OWA5a4454f1-8e87-9b84-50e1-a8b9e5883ba1" href="https://jcp.org/en/jsr/detail?id=223" target="_blank">
https://jcp.org/en/jsr/detail?id=223</a><br>
[4] <a style="margin:0px" rel="noopener noreferrer" title="https://v8.dev" id="m_1616575011542739086OWAb00106c1-df56-ff48-1ef4-456fe6de5eac" href="https://v8.dev" target="_blank">
https://v8.dev</a><br>
[5] <a style="margin:0px" rel="noopener noreferrer" title="https://mail.openjdk.org/pipermail/compiler-dev/2024-September/027645.html" id="m_1616575011542739086OWA1b1522ab-f774-cc79-3134-70a61fc2ee26" href="https://mail.openjdk.org/pipermail/compiler-dev/2024-September/027645.html" target="_blank">
https://mail.openjdk.org/pipermail/compiler-dev/2024-September/027645.html</a><br>
[6] <a style="margin:0px" rel="noopener noreferrer" title="https://github.com/python/cpython" id="m_1616575011542739086OWA75bddd70-bf0f-77ec-7fec-a2e786bb57a5" href="https://github.com/python/cpython" target="_blank">
https://github.com/python/cpython</a><br>
[7] <a style="margin:0px" rel="noopener noreferrer" title="https://openjdk.org/jeps/454" id="m_1616575011542739086OWA3164a9ba-9e14-ccc3-e969-4e36dd2da588" href="https://openjdk.org/jeps/454" target="_blank">
https://openjdk.org/jeps/454</a><br>
[8] <a style="margin:0px" rel="noopener noreferrer" title="http://openjdk.java.net/census#members" id="m_1616575011542739086OWA23a0deeb-8c7a-19b4-19fb-5d7f403fa0cb" href="http://openjdk.java.net/census#members" target="_blank">
http://openjdk.java.net/census#members</a><br>
[9] <a style="margin:0px" rel="noopener noreferrer" title="http://openjdk.java.net/projects/#new-project-vote" id="m_1616575011542739086OWA5378a1b1-86dc-5d7b-02b0-d0948b37e5aa" href="http://openjdk.java.net/projects/#new-project-vote" target="_blank">
http://openjdk.java.net/projects/#new-project-vote</a></div>
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