<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Apr 20, 2016, at 8:52 AM, Daniel Dunbar via swift-build-dev <<a href="mailto:swift-build-dev@swift.org" class="">swift-build-dev@swift.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class=""><blockquote type="cite" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">Indeed, my proposal is basically saying: modules should be small. But maybe this is too much.<br class=""></blockquote><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">I don't think I am comfortable with that assumption, currently.</span><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">In particular, module subdivision and visibility have substantial impact on performance (e.g., whole-module optimization), and performance sensitive clients are likely to want to put critical functionality in the same module even if it may be conceptually encapsulated. Modules are also very important for the Swift ABI resiliency model, which will encourage the same behavior.</span><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">Right now, for better or worse, modules are very similar to traditional libraries or frameworks, and not just because that is how we typically build them. It makes sense for a large project to subdivide code into modules along the same boundaries that would be done for those, which is typically fairly large.</span><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""></div></div></blockquote></div><br class=""><div class="">I read this proposal as an official way to push micro-frameworks into Swift. I don't know if that's the intention, but if so, I'm strongly against that. Daniel laid out some of the reasons why above.</div><div class=""><br class=""></div><div class="">In general though, I'd like to see proposals for SwiftPM moving towards the direction to allow people to structure their code how they want to or how they need instead of trying to come up with a convention to solve everyone's use cases. </div><div class=""><br class=""></div><div class="">For example, some of us layout our code like this:</div><div class=""><br class=""></div><div class=""><font face="Menlo" class="">src/</font></div><div class=""><font face="Menlo" class=""> component/</font></div><div class=""><font face="Menlo" class=""> subcomponent/</font></div><div class=""><font face="Menlo" class=""> win32/</font></div><div class=""><font face="Menlo" class=""> linux/</font></div><div class=""><font face="Menlo" class=""> droid/</font></div><div class=""><font face="Menlo" class=""> ios/</font></div><div class=""><font face="Menlo" class=""> macos/</font></div><div class=""><font face="Menlo" class=""> ...</font></div><div class=""><br class=""></div><div class="">For some projects, I only want to ship a single module for `component`. For other projects, I may want to actually ship both `component` and `subcomponent` as separate modules. Just provide me with the tools to tell you what to build.</div><div class=""><br class=""></div><div class="">-David</div></body></html>