CPU Speed

Crazy fast on non-AES 64-bits, usually 35-40% faster than other miners
Compared to other 32-bits miners, still faster on non-AES 32-bits, sometimes beating even the other miners 64-bits versions
And still comparatively faster on non-AES 32-bits Cryptonight-Heavy, with usually +50% speed.
Slightly faster than the other best on AES 64-bits, beating them by ~1% on CN-classic, +2.8% on v7 fork, +2% on v8, +4% on Cryptonight-Heavy
A lot faster than any other miner when mining BitTube v2, on any processor, with ~30% extra speed.
Also a lot faster on AES 32-bits, but it's a rare case (mostly seen on Intel Atom tablets)

Is that a Virus? No!

Like all miners, JCE gets detected as a virus by most Antiviruses, including Windows Defender. But it's not. Read more about Privacy and Security below.

Is it just yet-another fork of a common miner? No!

You're not losing your time testing a made-up rip of a common miner, JCE is brand new, using 100% new code.
Are the new Monero-V7, Cryptolight-V7, V8, Cryptonight-Heavy, IPBC/Bittube, Alloy, Arto/Fest/Hosp, MKT, B2N, Red, Fast/Masari, Haven, FreeHaven/Swap, UPX, Waltz, Turtle-V2, Dark and XTL forks supported? Yes!

Is it free (as in beer, as in freedom)?

No and no. It has fees, and is not open source. But the program itself is free to distribute.

How much cost the fees?

Current fees are:

3.0% when using at least one mining thread with non-AES architecture, or 32-bits
1.5% when using only 64-bits AES architecture
0.9% when using GPU

The fees are twice higher in non-AES mode and/or 32-bits because JCE offers a huge performance gain here.

Can I avoid fees?

Not really. I plan to offer a paying per-licence-no-fee (pay-once-for-all) version, but it's a lot more complicated to set up than a fee-based miner.
Also, JCE never takes any fee during the first minute, so if you run it, and kill it after one minute, and repeat again and again, then you'll never pay any fee, but JCE takes a few seconds to start, and your Pool probably won't let your reconnect continuously.

Will it work on my computer?

Minimum is Windows Vista 32-bits, or Linux, with a SSE2 capable CPU. 64-bits is faster, prefer it.
For best performance, Large Pages must be enabled, JCE will try to auto-configure them, but it may work or not depending on your Windows version and security configuration.

End of development

Due to lack of dev time to provide legit implementations of the new forks (read: not just a rip of the reference code), I had to end the dev. The forks listed below are the last to be supported and notably Monero4 isn't and won't be supported. The miner itself can still be used, with good performance, on the supported forks, including BitTube, Stellite v8 and Turtle v2.