Chronophagous

The method, however, cannot be considered strictly scientific and is much more tedious and chronophagous than the direct determination.

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As a chronophagous activity as it is, reducing the population's leisure budget, transports also imply a great expenditure of physical and nervous energy to the detriment of manpower's potentiality […]

Source: wiktionary

Chronophagous Discourse: A Study of Clerico-Legal Appropriation of the World in an Islamic Tradition

Source: wiktionary

[W]e have historical masses construed as individual states or permanent conditions of phylogeny. They are conceived as supra-historical masses which speak in the tones of a chronophagous discourse. Thus societies and nations rise and fall, but do not change in any serious sense, and the wheel of fortune is animated, quite literally, by internal, intransitive, self-subsistent pneumatic impulses ([Johann Gottfried] Herder's Kräfte) and which together can be described by the term Volksgeist.

Source: wiktionary