Bundle size

Every import of @northguild/gmt carries @js-temporal/polyfill, so the polyfill row is the floor under every other row: no import is smaller than it. The last four columns of the other rows show what is left once the floor is taken away.

The @northguild/gmt row is the whole package, all 714 public functions, which is the figure a package-size service such as Bundlephobia reports. A single function from a module costs far less than that row.

Import	Minified	Gzipped	Minified over the polyfill	Gzipped over the polyfill	Budget (minified)
import * as gmt from "@northguild/gmt"	561.1 kB	153.6 kB	408.6 kB	109.4 kB	566.3 kB
import { Temporal } from "@js-temporal/polyfill"	152.5 kB	44.2 kB	floor	floor	none
import { isValidDate } from "@northguild/gmt/plain/validate"	153.4 kB	44.6 kB	0.8 kB	0.4 kB	154.9 kB
import { formatDate } from "@northguild/gmt/plain/format"	156.9 kB	45.7 kB	4.3 kB	1.5 kB	158.3 kB
import { businessDaysBetween } from "@northguild/gmt/calendar/business"	155.9 kB	45.6 kB	3.4 kB	1.4 kB	157.5 kB
import { addBusinessDays } from "@northguild/gmt/plain/calculate"	157.0 kB	46.0 kB	4.5 kB	1.8 kB	158.6 kB
import { chargeableDays } from "@northguild/gmt/intermodal/calculate"	200.6 kB	59.6 kB	48.0 kB	15.4 kB	201.9 kB
import { operatingTimeBetween } from "@northguild/gmt/calendar/hours"	208.4 kB	61.7 kB	55.9 kB	17.5 kB	209.8 kB
import { dutyViolations } from "@northguild/gmt/workforce/calculate"	232.8 kB	69.5 kB	80.2 kB	25.3 kB	234.4 kB

Sizes come from bundling packages/gmt/src with esbuild, minified, as ES modules for a neutral platform. 1 kB is 1,000 bytes. The minified size of each row is gated: the repository’s check fails when it passes the budget in the last column, and a budget changes only by a reviewed edit. Gzipped sizes are reported and never gated, because they vary with the version of zlib.

The polyfill stays until a stable Safari ships Temporal and the weekly run against native Temporal passes on Node 26, Chromium, Firefox and WebKit for 12 weeks running (#316).