Friday Night Dinner: Poon's at Somerset House

Poon's is a stone throw away from the bustling Lancaster Place, in the New Wing of Somerset House. The room is bright, and has normal tables, a few high tables, and a communal style arrangement. We were seated at one of the high tables in the corner near the entrance, facing out with a good view over the interior.

At first glance the menu looks deceptively simple, but on closer examination there were many delicious options to choose from

We started with some pan-fried wind-dried sausage, which was slightly sticky, salty and delicious. We also shared a portion of The Hill That Amy Didn't Die On, a long-winded name for a prawn toast. But well done, and more like croquettes than the traditional flat shape — we're not sure that it actually involved bread.

For our mains I ordered the Char Siu, beautifully roasted pork belly with a sticky glaze. Some steamed rice was great for soaking up the juices. My wife chose the Steamed Catch of the Day. Today's was a Brill, which was presented whole, but taken off the bone for us. It was served with mushrooms — some of which were cut into strips and tied into little knots — and some greens. We shared more of these dishes than we would normally do.

We did not have space for desert as well, and instead enjoyed a digestive.

The meal was great, but it did end up being a little pricier than originally expected. But our digestive had something to do with that.

Poon's had a wonderful atmosphere, delicious food and welcoming staff, we'd definitely return and would recommend.

The Hill that Amy Didn't Die On
The Hill that Amy Didn't Die On
1 / 4
Wind-Dried Sausages
Wind-Dried Sausages
2 / 4
Char Siu
Char Siu
3 / 4
Steamed Brill
Steamed Brill
4 / 4

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Fail Faster

For a long time I have heard complaints that Xdebug, with its debugger enabled, slows down applications, even if there is no IDE listening.

I have never been able to reproduce this, as on Linux (and macOS), TCP connections to a localhost ports fail immediately if that port is not open.

Xdebug waits for up to 200ms when making a debug connection. This is configurable with the xdebug.connect_timeout_ms setting.

But if there is nothing listening, there should not be any delay, as it ought to be an immediate error.

I wrote a comment in an issue from 2024:

The error message ERR: Time-out connecting to debugging client, waited: 200 ms. indicates that your network stack doesn't immediately reject the connection if it can't be made. That's usually due to a (misconfigured) firewall.

It turns out, that it is not a firewall, but that Windows itself behaves bad here. Instead of failing immediately, it does retry sending TCP SYN packets to try to establish a connection. This is pointless on the local loopback interface, as network packets cannot get lost.

Through a post by Daniel Stenberg on Mastodon, I found out the cause, and a solution.

He explains how it affects curl's Happy Eyeballs algorithm in a blog post from 2024. Although Xdebug does not use Happy Eyeballs, the underlying problem is the same.

Last week, Marcel Jamin wrote to the curl mailing list, with a solution. This solution disables the retry mechanism to establish a connection. And in turn that means, that there is no longer a delay on Windows either.

I have today merged a pull request for Xdebug which implements this solution. The patch is part of the upcoming Xdebug 3.6 release.

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@blog nice one

@blog I think it probably is a firewall issue really, unless Windows is ignoring the RST packets that tell it nothing is listening.

That's what happens on linux - the SYN is sent and gets an RST and that is reported as a connection failure with EPORTUNREACH but if you firewall loopback so it doesn't get the RST then you get the Windows behaviour of it retrying SYN packets.

There's nothing special about the loopback handling in linux.

Friday Night Dinner: Zylia

The former TGI Fridays site in Covent Garden has been replaced by a food and cocktail court arrangement. There is a coffee shop and pancake place, but also a few restaurants around the perimeter with their own entrance. One of these is Zylia, a Greek/Cypriot restaurant.

Most of the dishes on the menu are meant for the table, so going with the sharing approach we opted for a selection of cold and warm Mezedakia to start. Their Taramosalata was probably one of the best variants that we've had. It wasn't oily, or overly salty, but thick and flavourful. Some of the bread that we ordered with it had the resemblance of a supermarket burger bun sliced vertically, oiled and seeded. It was also a bit salty, and the pittas served alongside were better.

We also shared the Spanakopita stack, consisting of crispy layers of filo pastry, with generous dollops of soft feta and spinach. The fried cheese croquettes were ball-shaped, and super hot fresh out of the fryer. They came with a sticky honey sauce.

From the Grill, we shared the Sheftalia (caul fat-wrapped pork parcels, think koftas), and the Chicken Souvlakia — marinated chicken thighs with lemon oil and oregano. Both meats were nicely cooked, and also full of flavour.

It is a bustling place, with a young audience. But it was also just a bit too noisy, to the point where it was difficult to have a conversation. The food however is delightful, and our five selected dishes were spot on quantity wise.

Spanakopita Stack
Spanakopita Stack
1 / 6
Taramosalata
Taramosalata
2 / 6
Chicken Souvlakia
Chicken Souvlakia
3 / 6
Sheftalia
Sheftalia
4 / 6
Pitta and Bread Selection
Pitta and Bread Selection
5 / 6
Fried Cheese Croquettes
Fried Cheese Croquettes
6 / 6

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